PIN CONNECTIONS
64 63 62 61 60 59 58 5756 55 54 53 52 51 50 49
DIN9
DIN8
DIN7
DIN6
DIN5
DIN4
DIN3
1
48
DOUT9
DOUT8
DOUT7
DOUT6
DOUT5
DOUT4
DOUT3
2
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
3
4
5
6
7
GS9021
TOP VIEW
V
8
V
DD
DD
GND
DIN2
DIN1
DIN0
PCLKIN
P7
9
GND
10
11
12
13
14
15
16
DOUT2
DOUT1
DOUT0
FLAG_MAP
F_R/W
FL4
P6
P5
FL3
17 18 19 20 21 22 23 2425 26 2728 29 30 3132
PIN DESCRIPTIONS
NUMBER
1-7, 10-12
13
SYMBOL
TYPE
DESCRIPTION
DIN[9:0]
PCLKIN
P[7:5]
I
I
Parallel digital video data inputs.
Parallel clock input.
14-16
I/O
In parallel port mode, these are bits 7:5 of the host interface address/data bus. In
I²C mode, these pins must be set LOW.
17
18
SCL/P4
SDA/P3
I/O
I/O
I/O
I
In parallel port mode, this is bit 4 of the host interface address/data bus. In I²C
mode, this is the serial clock input for the I²C port.
In parallel port mode, this is bit 3 of the host interface address/data bus. In I²C
mode, this is the serial data pin for the I²C port.
19-21
22
A[2:0]/P[2:0]
R/W
In parallel port mode, these are bits 2:0 of the host interface address/data bus. In
I²C mode, these are input bits which define the I²C slave address for the device.
Parallel port read/write control. When HIGH, the parallel port is configured as an
output (read mode). When LOW, the parallel port is configured as an input (write
mode). In I²C mode, this pin must be set HIGH.
23
24
A/D
CS
I
I
Parallel port address/data bus control. When HIGH, the parallel port is used for
address input. When LOW, the parallel port is used for data input or output. In
I²C mode, this pin must be set LOW.
Parallel port chip select. When CS is LOW and R/W is HIGH, the GS9021 drives
the address/data bus. When CS is LOW and R/W is LOW, the user should drive
the address/data bus. When CS is HIGH, the address/data bus is in a high
impedance state (Hi - Z). In I²C mode, this pin must be set HIGH.
25
HOSTIF_MODE
I
Host Interface mode select. When HIGH, the host interface is configured for I²C
mode. When LOW, the host interface is configured for parallel port mode.
4
521 - 65 - 05
GENNUM [ GENNUM CORPORATION ]
