H83502 datasheet(28/386 Pages) RENESAS

28 / 386 page

Table 1-3

Pin Functions (cont)

Pin No.

Type

Symbol

DP-64S

FP-64A

I/O

Name and Function

Host

interface

(HIF)

HDB0 to

HDB7

57 to 64

49 to 56

I/O

Host interface data bus: Bidirectional

8-bit bus for host interface access by

the host.

CS1

CS2

Chip select 1 and 2: Input pins for

selecting host interface channel 1 or

channel 2.

IOR

I/O read: Input pin that enables reads

on the host interface.

IOW

I/O write: Input pin that enables writes

to the host interface.

HA0

Command/data: Input pin that

indicates a data access or command

access.

GA20

GATE A20: GATE A20 control signal

output pin.

HIRQ1

HIRQ11

HIRQ12

Host interrupt 1, 11, 12: Output pins

for interrupt requests to the host.

Keyboard

control

KEYIN0

KEYIN7

1 to 4

31 to 34

57 to 60

23 to 26

Keyboard input: Input pins for a

matrix keyboard. (P10 to P17 and P20

to P27 are normally used as keyboard

scan outputs, enabling a maximum 16-

output

× 8-input, 128-key matrix to be

configured. The number of keys can

be increased by using other port

outputs.)

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