PCA9504A 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

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PCA9504A

8-bit I2C and SMBus I/O port with 2-kbit EEPROM

Philips Electronics 

Philips Semiconductors

Glue chip 4

Product data

PCA9504A

PIN DESCRIPTION CONTINUED

PIN(S)

50

3I

VSYNC_3V

51

5O

HSYNC_5V

52

5O

VSYNC_5V

53

AI

VCCP_VREF

SYMBOL

54

3IV/3O

STRAP

55

5I

GP3_IN

56

5V OD

GP3_OUT

NOTE:

1. The pin is internally pulled up to default to FLUSH mode.

FUNCTION

VSYNCH input from chipset video

HSYNCH output to monitor

VSYNCH output to monitor

Analog voltage reference for determining INIT/A20M input thresh-

olds

Strapping option for GP or FLUSH mode (internal pull-up resistor)

Note 1

Generic logic gate 3 input

Generic logic gate 3 output

TYPE

3I

3IU

5I

5IU

5ID

P

G

3O

5O

3V OD

5V OD

AO

AI

3IOD

5IOD

REFL

DESCRIPTION

3.3 V input signal

3.3 V input signal with internal pull-up

5 V input signal

5 V input signal with internal pull-up

5 V input signal with internal pull-down

Power (input)

Ground (input)

3.3 V output signal

5 V output signal

3.3 V open-drain output signal

5 v open-drain output signal

Analog output

Analog input

3.3 V input/output open-drain

5 V input/output open-drain

Input voltage levels referenced to VCCP_VREF

FUNCTION TABLES

Strapping Selection Pin

STRAP (pin 54)1

MODE1

PIN NAME & (PIN NUMBER)

1 No connect

FLUSH

GPO_FLUSH_CACHE (4)

1 No connect

FLUSH

A20M (5)

1 No connect

FLUSH

INIT (6)

1 No connect

FLUSH

FLUSH_OUT_CPU (7)

1 No connect

FLUSH

INIT_OUT (8)

0 GND

GP

GP2_IN (4)

0 GND

GP

GP1_INB (5)

0 GND

GP

GP1_INA (6)

0 GND

GP

GP1_OUT (7)

0 GND

GP

GP2_OUT (8)

NOTE:

1. The pin is internally pulled up to default to FLUSH mode.

2004 May 11

4

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