Sega Genesis 32X Service Manual

8. PARTS
SPECIFICATIONS
ICI/2
CPU
1C
HD6417095F2?QFP
Parts No.
: 315-0922
ICHDB417095F28QFP
Parts No.
:
315-0922A
I
Top
View
I
Description
No.
I/O
Pin Name
Function
Dll
2
I/O
D12
Data bus
3
D13
vcci
Power
suDpIv
CSVl
D14
Data bus
6
-
vssi
Power
supply
/OV)
D15
Data
bus
8
D16
9
I/O
D17
10
D18
11
D19
12
VCC2
Power
supply
fSV)
D20
Data bus
—
|
VSS2
Power
supply
fOVl
-\
I/O
D21
Data bus
16
D22
17
D23
“
VCC3
Power
supply
(5V|
I/O
D24
Data
bus
“
VSS3
Power
supply (OV)
21
I/O
D25
Data bus
22
D26
23
D27
VCC4
Power
supply
f5V>
26
D28
Data
bus
27
28
I/O
D29
D30
Data
bus
29
D3I
I/O
AO
Address
bus
31
A1
32
A2
-
VSSS
Power
supply
(OVl
34
A3
Address
bus
35
A4
36
A5
37
A6
38
A7
39
A8
VCC5
Power
supply /5V1
1
-
19
-
No. I/O
Pin
Name
Function
A9
Address bus
VSS6
Power
supply
f5V)
AID
44
All
45
VO
A12
Address bus
46
A13
47
AM
-
VCC6
Power
supply {5V)
49 I/O
A15
Address
bus
-
VSS7
Power supp.y
(OV)
A16
52
I/O
A17
Address
bus
53
AI8
“
VCC7
Power
supply (5V1
I/O
A19
Address
bus
VSS8
Power
supply (0V>
A20
58 I/O
A21
Address
bus
59
A22
-
VCC8
Power supply
fSV)
61
I/O
A23
Address
bus
62
~
VSS9
Power
supply fOV)
63
I/O
A24
Address
bus
64
A2S
65
A26
66
0
DACKO
DMACO
acknowledee
VCC9
Power supply
(SV)
68
DACKl
UMACl
acknowledjte
vssio
Power
supply /OVl
DREOO
DMACO
rctuest
DREOl
DMACl
request
Cso
Chip select 0
0
r.<51 Chip
select
1
CS2 Chip select
2
0S3 Oiip select
3
76
I/O
RS Bus
cycle start
I/O
RD/WR Read write
VSSll
Power
supply
(OV)
RAS.^ RAS for
DRAM/SDRAM/CE
for PSRAM
cas.Oe CAS
for SDRAM/OE
for PSRAM
CaShh. noMini WP.3 Each
memory
most
significant
byte select
signal
CASHL nOMlJL
WF.2
Each
memory
2nd byte
select
signal
(JASLH. DWMLIJ.
WF.1
Each memory
3rd
byte select
signal
VCCIO
Power
supply
fSV)
CASLL. DOMLL.
WRO
ba^
memory
least signiHcant
byte select
signal
86
VSS12
Power supply
(OVl
RD
Read pulse
CKE
SDRAM
clock enable
control
WAIT
Hardware wail
request.
BEN Reserve
VSS13
Power
supply (0V>
BACK. BRLS Bus right
permission
in slave mode./Bus
right
acknowledge
in master mode
BREO. BGR
Bus
right
reouest
in slave
mode./Bus
right acknowledge
in master mode
WDTOVF
Watch
dog
timer
quiput.
FTOB
Free-running
timer
output
B.
VCCll
Power
supply
f5V|
FTOA
Free-running
timer
output
A.
VSS14
Power supply
(OV)
FTI
Free-running
timer
input.
FTCI
tree-running
timer
clock
input.
RXD
Serial
data
input.
TXD
Serial
data output.
I/O
SCK
Serial
clock
input/outpui.

Sega Genesis 32X Specifications

General

Brand	Sega
Model	Genesis 32X
Category	Game Console
Language	English