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4

PIN CONNECTIONS

PIN DESCRIPTIONS

NUMBER

SYMBOL

TYPE

DESCRIPTION

1-7, 10-12

DIN[9:0]

I

Parallel digital video data inputs.

13

PCLKIN

I

Parallel clock input.

14-16

P[7:5]

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

SCL/P4

I/O

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.

18

SDA/P3

I/O

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

A[2:0]/P[2:0]

I/O

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.

22

R/W

I

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

A/D

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.

24

CS

I

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.

DIN9

DIN8

DIN7

DIN6

DIN5

DIN4

DIN3

GND

DIN2

DIN1

DIN0

PCLKIN

P7

P6

P5

DOUT9

DOUT8

DOUT7

DOUT6

DOUT5

DOUT4

DOUT3

GND

DOUT2

DOUT1

DOUT0

FLAG_MAP

F_R/W

FL4

FL3

17 18 19 20 21 22 23 24 25 26 2728 29 30 31 32

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

GS9021

TOP VIEW

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