Drop 74ABT74

The 74ABT74 is only used as a divider to create 25MHz from the 50MHz clock, and
it can be removed. Instead, the 50MHz are directly brought to the ATF1508. CLK
will be used as an output, not an input, so move away from GCLK pin. CLKI is no
longer needed on a pin as it doesn't connect to anything anymore.
This commit is contained in:
Stefan Reinauer 2025-03-30 14:16:44 -07:00
parent 625a067928
commit 490e441d0b
3 changed files with 137 additions and 1667 deletions

View File

@ -425,17 +425,15 @@
(net 344 "unconnected-(U12-5Y-Pad10)")
(net 345 "SCSI_BUSY")
(net 346 "Z_BERR")
(net 347 "unconnected-(U15B-~{Q}-Pad8)")
(net 348 "unconnected-(U15B-Q-Pad9)")
(net 349 "unconnected-(Y1-NC-Pad1)")
(net 350 "unconnected-(RN7-Pad4)")
(net 351 "unconnected-(RN7-Pad5)")
(net 352 "unconnected-(RN10-Pad5)")
(net 353 "unconnected-(RN10-Pad4)")
(net 354 "unconnected-(RN16-Pad3)")
(net 355 "unconnected-(RN16-Pad6)")
(net 356 "unconnected-(U6-I{slash}O-Pad97)")
(net 357 "unconnected-(U6-I{slash}O-Pad96)")
(net 347 "unconnected-(Y1-NC-Pad1)")
(net 348 "unconnected-(RN7-Pad4)")
(net 349 "unconnected-(RN7-Pad5)")
(net 350 "unconnected-(RN10-Pad5)")
(net 351 "unconnected-(RN10-Pad4)")
(net 352 "unconnected-(RN16-Pad3)")
(net 353 "unconnected-(RN16-Pad6)")
(net 354 "unconnected-(U6-I{slash}O-Pad97)")
(net 355 "unconnected-(U6-I{slash}O-Pad96)")
(footprint "Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder"
(layer "F.Cu")
(uuid "0060eff6-54fb-4ce9-979e-493ff57f78c2")
@ -1262,7 +1260,7 @@
(at -0.8763 1.5367)
(size 0.9652 1.2446)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 350 "unconnected-(RN7-Pad4)")
(net 348 "unconnected-(RN7-Pad4)")
(pintype "passive+no_connect")
(uuid "19305d75-1863-4c4d-b09a-79f3dfe15a85")
)
@ -1270,7 +1268,7 @@
(at 0.8763 1.5367)
(size 0.9652 1.2446)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 351 "unconnected-(RN7-Pad5)")
(net 349 "unconnected-(RN7-Pad5)")
(pintype "passive+no_connect")
(uuid "5bc0762e-d32b-4270-ba27-0b4c3e721f85")
)
@ -6845,7 +6843,7 @@
(at -0.8763 1.5367)
(size 0.9652 1.2446)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 353 "unconnected-(RN10-Pad4)")
(net 351 "unconnected-(RN10-Pad4)")
(pintype "passive+no_connect")
(uuid "3d70b297-1d56-43dc-8f99-d454fc3743af")
)
@ -6853,7 +6851,7 @@
(at 0.8763 1.5367)
(size 0.9652 1.2446)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 352 "unconnected-(RN10-Pad5)")
(net 350 "unconnected-(RN10-Pad5)")
(pintype "passive+no_connect")
(uuid "1a0b3acb-f08d-452a-975d-f1e45df078d9")
)
@ -14871,7 +14869,7 @@
)
)
)
(property "Datasheet" "ATF1508AS-10AU100"
(property "Datasheet" "https://ww1.microchip.com/downloads/en/DeviceDoc/doc0784.pdf"
(at 0 0 0)
(layer "F.Fab")
(hide yes)
@ -20127,7 +20125,7 @@
(at 6.000001 -7.750002)
(size 0.27 1.4612)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 62 "Z_MTACK")
(net 176 "CLK")
(pinfunction "I/O")
(pintype "bidirectional")
(uuid "5adfd627-daa8-4b01-90bb-6f91e6753254")
@ -20226,7 +20224,7 @@
(at 0.499999 -7.750002)
(size 0.27 1.4612)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 176 "CLK")
(net 202 "CLK_50M")
(pinfunction "INPUT/GCLK1")
(pintype "bidirectional")
(uuid "f66926be-2262-484c-ba53-131dae1f14fd")
@ -20253,7 +20251,7 @@
(at -1.000001 -7.750002)
(size 0.27 1.4612)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 175 "CLKI")
(net 62 "Z_MTACK")
(pinfunction "INPUT/OE2/GCLK2")
(pintype "bidirectional")
(uuid "73a5d89a-2635-4738-84cf-78e3279f922e")
@ -20307,7 +20305,7 @@
(at -4 -7.750002)
(size 0.27 1.4612)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 357 "unconnected-(U6-I{slash}O-Pad96)")
(net 355 "unconnected-(U6-I{slash}O-Pad96)")
(pinfunction "I/O")
(pintype "bidirectional")
(uuid "e48f34b7-fe21-407d-828e-0ccd4d2569d9")
@ -20316,7 +20314,7 @@
(at -4.500001 -7.750002)
(size 0.27 1.4612)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 356 "unconnected-(U6-I{slash}O-Pad97)")
(net 354 "unconnected-(U6-I{slash}O-Pad97)")
(pinfunction "I/O")
(pintype "bidirectional")
(uuid "acdd1d4a-d3b1-4e1b-96bc-c0d503237ca5")
@ -24100,7 +24098,7 @@
(at -0.8763 0.41402)
(size 0.9652 0.6604)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 354 "unconnected-(RN16-Pad3)")
(net 352 "unconnected-(RN16-Pad3)")
(pintype "passive+no_connect")
(uuid "52f1c126-1ae6-42de-8eee-cc4e7b29b338")
)
@ -24124,7 +24122,7 @@
(at 0.8763 0.41529)
(size 0.9652 0.6604)
(layers "F.Cu" "F.Mask" "F.Paste")
(net 355 "unconnected-(RN16-Pad6)")
(net 353 "unconnected-(RN16-Pad6)")
(pintype "passive+no_connect")
(uuid "d843b699-bfbd-473c-a14c-fb1ff759af9d")
)
@ -33147,7 +33145,6 @@
)
)
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@ -41674,7 +41671,7 @@
(drill 0.8)
(layers "*.Cu" "*.Mask")
(remove_unused_layers no)
(net 349 "unconnected-(Y1-NC-Pad1)")
(net 347 "unconnected-(Y1-NC-Pad1)")
(pinfunction "NC")
(pintype "no_connect")
(uuid "3bda6a74-9ce6-4b8c-87dc-4eef725fc5af")
@ -42559,369 +42556,6 @@
)
)
)
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@ -51709,7 +51343,6 @@
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View File

@ -3181,28 +3181,6 @@
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@ -3445,6 +3423,28 @@
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@ -4215,6 +4193,28 @@
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@ -4281,6 +4281,28 @@
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@ -4413,28 +4435,6 @@
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)
(global_label "ROM_OE"
(shape input)
(at 31.75 146.05 180)

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