Philips Semiconductors

Product specification

PCK2001M

1999 Jul 06

10

SERIAL CONFIGURATION MAP

The serial bits will be read by the clock buffer in the following order:

Byte 0 – Bits 7, 6, 5, 4, 3, 2, 1, 0

Byte 1 – Bits 7, 6, 5, 4, 3, 2, 1, 0

Byte 2 – Bits 7, 6, 5, 4, 3, 2, 1, 0

All unused register bits (Reserved and N/A) should be desined as “Dont Care”. It is expected that the controller will force all of these bits to a “0”

level.

All register bits labeled “Initialize to 0” must be written to zero during intialization. Failure to do so may result in a higher than normal operating

current. The controller will read back the last written value.

Byte 0:

Output active/inactive register

1 = enable; 0 = disable

BIT

PIN#

NAME

DESCRIPTION

7

—

BUF_OUT7

Initialize to 0

6

—

BUF_OUT6

Initialize to 0

5

—

BUF_OUT5

Initialize to 0

4

—

BUF_OUT4

Initialize to 0

3

7

BUF_OUT3

Active/Inactive

2

6

BUF_OUT2

Active/Inactive

1

3

BUF_OUT1

Active/Inactive

0

2

BUF_OUT0

Active/Inactive

NOTE:

1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are

not expected to be configured during the normal modes of operation.

Byte 1:

Output active/inactive register

1 = enable; 0 = disable

BIT

PIN#

NAME

DESCRIPTION

7

27

BUF_OUT15

Active/Inactive

6

26

BUF_OUT14

Active/Inactive

5

23

BUF_OUT13

Active/Inactive

4

22

BUF_OUT12

Active/Inactive

3

—

BUF_OUT11

Initialize to 0

2

—

BUF_OUT10

Initialize to 0

1

—

BUF_OUT9

Initialize to 0

0

—

BUF_OUT8

Initialize to 0

NOTE:

1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are

not expected to be configured during the normal modes of operation.

Byte 2:

Optional register for possible future requirments

BIT

PIN#

NAME

DESCRIPTION

7

18

BUF_OUT17

Active/Inactive

6

11

BUF_OUT16

Active/Inactive

5

—

(reserved)

(reserved)

4

—

(reserved)

(reserved)

3

—

(reserved)

(reserved)

2

—

(reserved)

(reserved)

1

—

(reserved)

(reserved)

0

—

(reserved)

(reserved)

NOTE:

1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are

not expected to be configured during the normal modes of operation.