Sharp UX-B20 Service Manual page 62

UX-B20U/UX-B20C/B25C
µPD65945 (IC4) Pin descriptions
SYMBOL PIN NO.
SDRAM Bus Interface (33 pin)
RA0 35
RA1 34
RA2 33
RA3 32
RA4 31
RA5 30
RA6 29
RA7 28
RA8 27
RA9 26
RA10 39
RB 40
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
RD8 19
RD9 18
RD10 17
RD11 16
RD12 15
RD13 14
RD14 13
RD15 12
RCS_N 41
RRAS_N 42
RCAS_N 43
RWE_N 44
PCLK 22
I/O
O Address bus
L: Logic-0
O
H: Logic-1
O
O
O
O
O
O
O
O
O
O Black select
L: Bank-0
H: Bank-1
9 I/O Data bus
L: Logic-0
8 I/O
H: Logic-1
7 I/O
6 I/O
5 I/O
4 I/O
3 I/O
2 I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O Chip select
L: Select
H: Deselect
O Command/Control
L: Active
O
H: In Active
O
O SDRAM operation clock
DESCRIPTION PAD CELL.
5 – 13
NOTE
FO09
FO09
FO09
FO09
FO09
FO09
FO09
FO09
FO09
FO09
FO09
FO09
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
B00U
FO09
FO09
FO09
FO09
FE04 32.256 MHz