Philips Semiconductors

PCF85103C-2

256

Product data

Rev. 04 — 22 October 2004

4 of 20

9397 750 14218

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

6.

Pinning information

6.1 Pinning

6.2 Pin description

7.

Device addressing

[1]

The Most Significant Bit (MSB) ‘b7’ is sent first.

A2, A1, A0 are hardware selectable pins.

equivalent to a 16 kbit EEPROM or 8 pages of 256 bytes of memory.

The eight addresses are defined by the state of the A0, A1, A2 inputs (logic level ‘1’

various address combinations.

Fig 2.

Pin configuration.

1

2

3

4

8

7

6

5

A0

A1

A2

VSS

SDA

SCL

N.C.

VDD

002aaa251

Table 4:

Pin description

Symbol

Pin

Description

A0

1

address input 0

A1

2

address input 1

A2

3

address input 2

4

negative supply voltage

SDA

5

SCL

6

N.C.

7

no connect

8

positive supply voltage

Table 5:

Device address code

Selection

Device code

Chip Enable

R/W

Bit

b7[1]

b6

b5

b4

b3

b2

b1

b0

Device

0

0

1

0

A2

A1

A0

R/W