UX-B20U/UX-B20C/B25C
5 – 13
µ
PD65945 (IC4) Pin descriptions
SYMBOL
PIN NO.
I/O
DESCRIPTION
PAD CELL.
NOTE
SDRAM Bus Interface (33 pin)
RA0
35
O
Address bus
L: Logic-0
H: Logic-1
FO09
RA1
34
O
FO09
RA2
33
O
FO09
RA3
32
O
FO09
RA4
31
O
FO09
RA5
30
O
FO09
RA6
29
O
FO09
RA7
28
O
FO09
RA8
27
O
FO09
RA9
26
O
FO09
RA10
39
O
FO09
RB
40
O
Black select
L: Bank-0
H: Bank-1
FO09
RD0
9
I/O
Data bus
L: Logic-0
H: Logic-1
B00U
RD1
8
I/O
B00U
RD2
7
I/O
B00U
RD3
6
I/O
B00U
RD4
5
I/O
B00U
RD5
4
I/O
B00U
RD6
3
I/O
B00U
RD7
2
I/O
B00U
RD8
19
I/O
B00U
RD9
18
I/O
B00U
RD10
17
I/O
B00U
RD11
16
I/O
B00U
RD12
15
I/O
B00U
RD13
14
I/O
B00U
RD14
13
I/O
B00U
RD15
12
I/O
B00U
RCS_N
41
O
Chip select
L: Select
H: Deselect
FO09
RRAS_N
42
O
Command/Control
L: Active
H: In Active
FO09
RCAS_N
43
O
FO09
RWE_N
44
O
FO09
PCLK
22
O
SDRAM operation clock
FE04
32.256 MHz
