Changeset f3b6086 in avrstuff for CPC stuff/ch376/ramcard.sch

Timestamp:

Oct 18, 2015, 7:09:32 PM (9 years ago)

Author:

Adrien Destugues <pulkomandy@…>

Branches:

main

Children:

208ae00

Parents:

1932780

Message:

Update following Gerald's coomments

• Use 74LS38 instead of 74LS00 and remove diodes
• Add pull-up for the one pin that doesn't have one (PRESET)
• Optimize layout a bit

git-svn-id: ​svn://pulkomandy.tk/avrstuff@118 c6672c3c-f6b6-47f9-9001-1fd6b12fecbe

File:

• CPC stuff/ch376/ramcard.sch (modified) (3 diffs)

CPC stuff/ch376/ramcard.sch

@@ -1251 +1251 @@
 Text Notes 3300 5800 0    60   ~ 0
 UART to USB bridge
-$Comp
-L 74LS00 U5
-U 1 1 56239F5E
-P 3400 3700
-F 0 "U5" H 3400 3750 60  0000 C CNN
-F 1 "74LS00" H 3400 3600 60  0000 C CNN
-F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 3700 60  0001 C CNN
-F 3 "" H 3400 3700 60  0000 C CNN
-        1    3400 3700
-        1    0    0    -1  
-$EndComp
-$Comp
-L 74LS00 U5
-U 3 1 5623A003
-P 3400 4800
-F 0 "U5" H 3400 4850 60  0000 C CNN
-F 1 "74LS00" H 3400 4700 60  0000 C CNN
-F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 4800 60  0001 C CNN
-F 3 "" H 3400 4800 60  0000 C CNN
-        3    3400 4800
-        1    0    0    -1  
-$EndComp
-$Comp
-L 74LS00 U5
-U 2 1 5623A088
-P 3400 4200
-F 0 "U5" H 3400 4250 60  0000 C CNN
-F 1 "74LS00" H 3400 4100 60  0000 C CNN
-F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 4200 60  0001 C CNN
-F 3 "" H 3400 4200 60  0000 C CNN
-        2    3400 4200
-        1    0    0    -1  
-$EndComp
-$Comp
-L 74LS00 U5
-U 4 1 5623A12F
-P 6350 4250
-F 0 "U5" H 6350 4300 60  0000 C CNN
-F 1 "74LS00" H 6350 4150 60  0000 C CNN
-F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 6350 4250 60  0001 C CNN
-F 3 "" H 6350 4250 60  0000 C CNN
-        4    6350 4250
-        1    0    0    -1  
-$EndComp
 Text Label 2050 5100 2    60   ~ 0
 /INT
@@ -1301 +1257 @@
 Text Label 800  4900 0    60   ~ 0
 BUSRST
-Text Label 4500 4200 0    60   ~ 0
+Text Label 4100 3700 0    60   ~ 0
 /INT
-Text Label 4500 3700 0    60   ~ 0
+Text Label 4100 4200 0    60   ~ 0
 /NMI
-$Comp
-L D D1
-U 1 1 5623AA99
-P 4250 3700
-F 0 "D1" H 4250 3800 50  0000 C CNN
-F 1 "D" H 4250 3600 50  0000 C CNN
-F 2 "Diodes_ThroughHole:Diode_DO-41_SOD81_Horizontal_RM10" H 4250 3700 60  0001 C CNN
-F 3 "" H 4250 3700 60  0000 C CNN
-        1    4250 3700
-        1    0    0    -1  
-$EndComp
-$Comp
-L D D2
-U 1 1 5623ABED
-P 4250 4200
-F 0 "D2" H 4250 4300 50  0000 C CNN
-F 1 "D" H 4250 4100 50  0000 C CNN
-F 2 "Diodes_ThroughHole:Diode_DO-41_SOD81_Horizontal_RM10" H 4250 4200 60  0001 C CNN
-F 3 "" H 4250 4200 60  0000 C CNN
-        1    4250 4200
-        1    0    0    -1  
-$EndComp
 Wire Wire Line
         4000 3700 4100 3700
 Wire Wire Line
         4000 4200 4100 4200
-Wire Wire Line
-        4400 4200 4500 4200
-Wire Wire Line
-        4400 3700 4500 3700
 Text Label 7100 1300 0    60   ~ 0
 /OUT1
@@ -1446 +1376 @@
         -1   0    0    1   
 $EndComp
+$Comp
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+U 1 1 5623C69E
+P 3400 3700
+F 0 "U5" H 3400 3750 60  0000 C CNN
+F 1 "74LS38" H 3400 3650 60  0000 C CNN
+F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 3700 60  0001 C CNN
+F 3 "" H 3400 3700 60  0000 C CNN
+        1    3400 3700
+        1    0    0    -1  
+$EndComp
+$Comp
+L 74LS38 U5
+U 2 1 5623C7AF
+P 3400 4200
+F 0 "U5" H 3400 4250 60  0000 C CNN
+F 1 "74LS38" H 3400 4150 60  0000 C CNN
+F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 4200 60  0001 C CNN
+F 3 "" H 3400 4200 60  0000 C CNN
+        2    3400 4200
+        1    0    0    -1  
+$EndComp
+$Comp
+L 74LS38 U5
+U 3 1 5623C846
+P 3400 4800
+F 0 "U5" H 3400 4850 60  0000 C CNN
+F 1 "74LS38" H 3400 4750 60  0000 C CNN
+F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 3400 4800 60  0001 C CNN
+F 3 "" H 3400 4800 60  0000 C CNN
+        3    3400 4800
+        1    0    0    -1  
+$EndComp
+$Comp
+L 74LS38 U5
+U 4 1 5623C8AF
+P 6350 4250
+F 0 "U5" H 6350 4300 60  0000 C CNN
+F 1 "74LS38" H 6350 4200 60  0000 C CNN
+F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 6350 4250 60  0001 C CNN
+F 3 "" H 6350 4250 60  0000 C CNN
+        4    6350 4250
+        1    0    0    -1  
+$EndComp
+Wire Wire Line
+        4000 4800 4550 4800
+$Comp
+L R R6
+U 1 1 5623E101
+P 4550 4650
+F 0 "R6" V 4630 4650 50  0000 C CNN
+F 1 "4K7" V 4550 4650 50  0000 C CNN
+F 2 "Resistors_SMD:R_0805" V 4480 4650 30  0001 C CNN
+F 3 "" H 4550 4650 30  0000 C CNN
+        1    4550 4650
+        1    0    0    -1  
+$EndComp
+$Comp
+L VCC #PWR021
+U 1 1 5623E535
+P 4550 4350
+F 0 "#PWR021" H 4550 4200 50  0001 C CNN
+F 1 "VCC" H 4550 4500 50  0000 C CNN
+F 2 "" H 4550 4350 60  0000 C CNN
+F 3 "" H 4550 4350 60  0000 C CNN
+        1    4550 4350
+        1    0    0    -1  
+$EndComp
+Wire Wire Line
+        4550 4500 4550 4350
 $EndSCHEMATC