SPC08A

5. SIGNAL DESCRIPTIONS*

Mnemonic

PIN No.

Type

Description

VDD

8

I

POWER VDD

VSS

11

I

POWER VSS

XI

1

I

CRYSTAL OSC IN or RESISTOR

XO

40

O

CRYSTAL OSC OUT

OPT***

8A

I

Rosc OPTION connect to VDD

RESET

39

I

RESET

TEST

35

I

TEST MODE

AUD

3

O

AUDIO OUTPUT

IOA0

IOA1

IOA2

IOA3

IOA4

IOA5

34

33

32

31

30

29

I/O

I/O

I/O

I/O

I/O

I/O

Port A is a 6-bit bi-directional programmable Input / Output port with Pull-high or

Open-drain option. As inputs, Port A can be in either the Pure or Pull-high states.

As outputs, Port A can be either Buffer or Open-drain NMOS types (Sink current).

**See note 1 and 2 below.

IOB0

IOB1

IOB2

IOB3

IOB4

IOB5

28

24

23

22

21

20

I/O

I/O

I/O

I/O

I/O

I/O

Port B is a 6-bit bi-directional programmable Input / Output port with Pull-low or

Open-drain option. As inputs, Port B can be in either the Pure or Pull-low states. As

outputs, Port B can be either Buffer or Open-drain NMOS types (Sink current).

IOC1: EXT INT IN

IOC2: EXT COUNT IN

**See note 1 and 2 below.

IOD0

IOD1

IOD2

IOD3

IOD4

IOD5

19

18

13

12

10

9

I/O

I/O

I/O

I/O

I/O

I/O

Port D is a 6-bit bi-directional programmable Input/Output port with Pull-low or

Open-drain option. As inputs, Port D can be either Pure or Pull-low states. As

outputs, Port D can be either Buffer or Open-drain PMOS type (source current).

(Key change, Wake up I/O)

**See note 1 and 2 below.

* Refer to SPC Programming Guide for complete information.

OPT

VDD

**Note: 1.) Three input states can be specified; Pure Input, Pull-High or Pull Low.

2.) Three output states can be specified, Buffer output, Open Drain PMOS output (source), or Open Drain NMOS

output (sink).

***OPT is the selection pin for ROSC or X’TAL using the bonding option. The shape looks like the figure at the right. When

ROSC is selected, OPT is connected to VDD. If X’TAL is selected, OPT is floating. The reason OPT is near VDD is that

when ROSC is selected, it is easy to make the connection between VDD and OPT.

© Sunplus Technology Co., Ltd.

Proprietary & Confidential

4

SEP. 19, 2001

Version: 1.7