8

DA9191EB.006

June 30,1997

CONNECTOR DESCRIPTION

Connector name

Pin

Function

P7

LCD connector. The HD44780 LCD controller command register exits at

address 0x1FFC and the data register is at address 0x1FFD.

1

Ground.

2

+5Vdc power supply.

3

Contrast control.

4

Register select. Connected to uP line A0 = address 0.

5

LCD enable input.

6

R/W input. Connected to ground. Always in write mode.

7

Data line 0.

8

Data line 1.

9

Data line 2.

10

Data line 3.

11

Data line 4.

12

Data line 5.

13

Data line 6.

14

Data line 7.

RAM MEMORY

FLASH

P6

Physical Flash memory area

0-7FFFH

8000H

1-2

8000H-FFFFH

0-7FFFH

8000H

2-3

0000H-7FFFH

P8

The digital output port at address 0x1FFE.

1

Ground.

2

Data output 0.

3

Data output 1.

4

Data output 2.

5

Data output 3.

6

Data output 4.

7

Data output 5.

8

Data output 6.

9

Data output 7.

10

VDD

P3

RS-232-C interface.

2

Received data from DTE.

3

Transmit data to DTE.

7

Data terminal ready input. Note that this line can be used to reset the entire

evaluation board.

20

Signal ground.