Add behavioral (LOGICEXP, PINDLY) test for 283 circuit. There are glitches in the simulation for some of the s* outputs. Probably due to not having inertial delays. And why not set 'zero' delays as close to zero as permitted by XSPICE.
This commit is contained in:
Brian Taylor
Holger Vogt
parent
4e76586b6b
commit
b142be7fde
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@ -0,0 +1,91 @@
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Behavioral CMOS 283 : 4-bit adder
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*-------------------------------------------------------------74AC283-----
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*
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* The 74AC283 4-Bit Binary Full Adder with Fast Carry
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* (4 Page Fax) Harris Advanced CMOS Logic, File Number 1912
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* and Philips Semiconductors High-speed CMOS Logic Data Handbook
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* for the logic diagram, 1994, page 564
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* jat 7/26/95
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.SUBCKT 74AC283
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+ A0 A1 A2 A3 B0 B1 B2 B3 CIN COUT S0 S1 S2 S3
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+ OPTIONAL: DPWR=$G_DPWR DGND=$G_DGND
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+ PARAMS: MNTYMXDLY=0 IO_LEVEL=0
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U1 LOGICEXP(9,5) DPWR DGND
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+ A0 A1 A2 A3 B0 B1 B2 B3 CIN
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+ S_0 S_1 S_2 S_3 C_OUT
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+ D0_GATE IO_AC
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+ MNTYMXDLY={MNTYMXDLY} IO_LEVEL={IO_LEVEL}
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+ LOGIC:
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+ S_0 = {A0 ^ B0 ^ CIN}
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+ NOR1 = {(A0 | B0) & (CIN | (A0 & B0))}
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+ S_1 = {NOR1 ^ A1 ^ B1}
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+ NOR2 = {~((~(A1 | B1)) | ((~(A0 | B0)) & (~(A1 & B1))) |
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+ ((~(A1 & B1)) & (~(A0 & B0)) & (~CIN)))}
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+ S_2 = {NOR2 ^ A2 ^ B2}
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+ AND31 = {(~(A2 & B2)) & (~(A1 & B1)) & (~(A0 & B0)) & (~CIN)}
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+ AND32 = {(~(A0 | B0)) & (~(A2 & B2)) & (~(A1 & B1))}
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+ AND33 = {(~(A1 | B1)) & (~(A2 & B2))}
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+ NOR3 = {~(AND31 | AND32 | AND33 | (~(A2 | B2)))}
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+ S_3 = {NOR3 ^ A3 ^ B3}
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+ ANDC1 = {(~(A3 & B3)) & (~(A2 & B2)) & (~(A1 & B1)) &
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+ (~(A0 & B0)) & (~CIN)}
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+ ANDC2 = {(~(A0 | B0)) & (~(A3 & B3)) & (~(A2 & B2)) & (~(A1 & B1))}
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+ ANDC3 = {(~(A1 | B1)) & (~(A3 & B3)) & (~(A2 & B2))}
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+ ANDC4 = {(~(A2 | B2)) & (~(A3 & B3))}
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+ C_OUT = {~(ANDC1 | ANDC2 | ANDC3 | ANDC4 | (~(A3 | B3)))}
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U2 PINDLY(5,0,9) DPWR DGND
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+ S_0 S_1 S_2 S_3 C_OUT
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+ A0 A1 A2 A3 B0 B1 B2 B3 CIN
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+ S0 S1 S2 S3 COUT
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+ IO_AC
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+ MNTYMXDLY={MNTYMXDLY} IO_LEVEL={IO_LEVEL}
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+ BOOLEAN:
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+ CARRYIN = {CHANGED(CIN,0)}
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+ NUMBER = {CHANGED(A0,0) | CHANGED(A1,0) | CHANGED(A2,0) |
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+ CHANGED(A3,0) | CHANGED(B0,0) | CHANGED(B1,0) |
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+ CHANGED(B2,0) | CHANGED(B3,0)}
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+ PINDLY:
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+ S0 S1 S2 S3 = {
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+ CASE(
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+ NUMBER & (TRN_LH | TRN_HL), DELAY(4.7NS,-1,16.5NS),
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+ CARRYIN & (TRN_LH | TRN_HL), DELAY(4.5NS,-1,16NS),
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+ DELAY(5.7NS,-1,17.5NS))}
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+ COUT = {
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+ CASE(
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+ NUMBER & (TRN_LH | TRN_HL), DELAY(4.5NS,-1,16NS),
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+ CARRYIN & (TRN_LH | TRN_HL), DELAY(4.5NS,-1,16NS),
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+ DELAY(5.7NS,-1,17.5NS))}
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.ENDS 74AC283
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X1 a0 a1 a2 a3 b0 b1 b2 b3 cin cout s0 s1 s2 s3 74ac283
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a_1 [ a3 a2 a1 a0 b3 b2 b1 b0 cin ] input_vec1
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.model input_vec1 d_source(input_file = "ex283.stim")
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.tran 0.01ns 2us
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.control
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run
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listing
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edisplay
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eprint a3 a2 a1 a0 b3 b2 b1 b0 cin
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eprint s3 s2 s1 s0 cout
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* save data to input directory
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cd $inputdir
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eprvcd a3 a2 a1 a0 b3 b2 b1 b0 cin s3 s2 s1 s0 cout > behav-283.vcd
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* plotting the vcd file with GTKWave
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if $oscompiled = 1 | $oscompiled = 8 ; MS Windows
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shell start gtkwave behav-283.vcd --script nggtk.tcl
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else
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if $oscompiled = 7 ; macOS, manual tweaking required (mark, insert, Zoom Fit)
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shell open -a gtkwave behav-283.vcd
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else ; Linux and others
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shell gtkwave behav-283.vcd --script nggtk.tcl &
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end
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end
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quit
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.endc
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.end
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@ -629,47 +629,47 @@ static void gen_models(void)
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d_inv_zero_delay d_inverter(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d_inv_zero_delay d_inverter(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__inverter__1 d_inverter(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__inverter__1 d_inverter(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__buffer__1 d_buffer(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__buffer__1 d_buffer(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__nand__1 d_nand(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__nand__1 d_nand(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__and__1 d_and(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__and__1 d_and(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__xnor__1 d_xnor(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__xnor__1 d_xnor(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__xor__1 d_xor(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__xor__1 d_xor(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__nor__1 d_nor(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__nor__1 d_nor(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_clear(&model);
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ds_cat_printf(&model,
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".model d__or__1 d_or(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d__or__1 d_or(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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u_add_instance(ds_get_buf(&model));
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ds_free(&model);
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@ -720,7 +720,7 @@ struct card *replacement_udevice_cards(void)
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}
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if (add_zero_delay_inverter_model) {
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x = create_xlate_translated(
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".model d_zero_inv99 d_inverter(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model d_zero_inv99 d_inverter(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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translated_p = add_xlator(translated_p, x);
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}
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if (add_drive_hilo) {
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@ -729,7 +729,7 @@ struct card *replacement_udevice_cards(void)
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x = create_xlate_translated("a1 0 drive___0 dbuf1");
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translated_p = add_xlator(translated_p, x);
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x = create_xlate_translated(
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".model dbuf1 d_buffer(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model dbuf1 d_buffer(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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translated_p = add_xlator(translated_p, x);
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x = create_xlate_translated(".ends hilo_dollar___lo");
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translated_p = add_xlator(translated_p, x);
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@ -738,7 +738,7 @@ struct card *replacement_udevice_cards(void)
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x = create_xlate_translated("a2 0 drive___1 dinv1");
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translated_p = add_xlator(translated_p, x);
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x = create_xlate_translated(
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".model dinv1 d_inverter(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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".model dinv1 d_inverter(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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translated_p = add_xlator(translated_p, x);
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x = create_xlate_translated(".ends hilo_dollar___hi");
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translated_p = add_xlator(translated_p, x);
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@ -2504,7 +2504,7 @@ static char *get_estimate(struct timing_data *tdp)
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*/
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static char *get_zero_rise_fall(void)
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{
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return tprintf("(rise_delay=1.0e-11 fall_delay=1.0e-11)");
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return tprintf("(rise_delay=1.0e-12 fall_delay=1.0e-12)");
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}
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static char *get_delays_ugate(char *rem)
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@ -2549,10 +2549,10 @@ static char *get_delays_utgate(char *rem)
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if (strlen(rising) > 0 && strlen(falling) > 0) {
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delays = tprintf("(delay = %s)", rising);
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} else {
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delays = tprintf("(delay=1.0e-11)");
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delays = tprintf("(delay=1.0e-12)");
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}
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} else {
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delays = tprintf("(delay=1.0e-11)");
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delays = tprintf("(delay=1.0e-12)");
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}
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delete_timing_data(tdp1);
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delete_timing_data(tdp2);
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