SPC251A Sunplus Technology Co., Ltd., SPC251A Datasheet - Page 4

• Manufacturer Part Number: SPC251A
• Description: 256KB SOUND CONTROLLER
• Manufacturer: Sunplus Technology Co., Ltd.

5. SIGNAL DESCRIPTIONS*
* Refer to SPC Programming Guide for complete information.
**Note: 1.) Two input states can be specified; Pure Input, Pull-High or Pull Low.
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Proprietary & Confidential
Mnemonic
VDD
VSS
XI
XO
TEST
RESET
AUD1
AUD2
IOB0
IOB1
IOB2
IOB3
IOB4
IOB5
IOB6
IOB7
IOC0
IOC1
IOC2
IOC3
IOC4
IOC5
IOC6
IOC7
IOD0
IOD1
IOD2
IOD3
IOD4
IOD5
IOD6
IOD7
2.) Three output states can be specified as Buffer output, Open Drain PMOS output (send), or Open Drain NMOS output (sink).
PIN No.
13, 14
17
19
18
22
16
20
21
31
32
33
15
12
10
30
29
28
27
26
25
24
23
11
1
2
3
4
5
9
8
7
6
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
I
Power VDD
Power VSS
Oscillator crystal input or RESISTOR (Resistor should be connected to VDD)
Oscillator crystal output
TEST MODE
This pin is an active low reset for the chip.
AUDIO OUTPUT
Port B is an 8-bit bi-directional 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).
**See note 1 and 2 below.
Port C is an 8-bit bi-directional Input / Output port with Pull-high or Open-drain option.
As inputs, Port C can be in either the Pure or Pull-high states. As outputs Port C can
be a Buffer type or Open-drain type. Port C3 - 0 are Open-drain NMOS type (Sink
current) and Port C7 - 4 are Open-drain PMOS (Send current).
IOC0: Serial programming Data
IOC1: Also selectable as an external interrupt PIN
IOC2: EXT COUNT IN
**See note 1 and 2 below.
Port D is an 8-bit bi-directional 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 (send current).
programmed for wake-up I/O pins. (Programmable I/O, Key Change, Wake-up I/O).
**See note 1 and 2 below.
4
Description
Also, Port D can be software
SPC251A
SEP. 10, 2001
Version: 1.7