PCF8598C-2 Datasheet, PDF (5/21 Pages) NXP Semiconductors – 1024 ´ 8-bit CMOS EEPROM with I2C-bus interface

Philips Semiconductors
PCF8598C-2
1024 × 8-bit CMOS EEPROM with I²C-bus interface
7. Device addressing
Table 5: Device address code
Selection
Device code
Bit
b7^[1]
b6
b5
b4
Device
1
0
1
0
[1] The Most Significant Bit (MSB) ‘b7’ is sent first.
Chip Enable
R/W
b3
b2
b1
b0
A2
A1
A0
R/W
A2 is the hardware selectable pin, A1 and A0 are software selectable pins.
A system could have up to two PCF8598C-2 devices on the same I²C-bus, equivalent
to a 16 kbit EEPROM, or 2 devices of 1024 bytes of memory, or 8 pages of 256 bytes
of memory.
A1 and A0 select a 256 byte page (one of the four pages available) on the selected
device. The device is selected by bit A2. Figure 3 shows the various address and
page combinations.
I²C-BUS
PCF8598C-2
DEVICE 1
256-BYTE PAGE 4
256-BYTE PAGE 3
256-BYTE PAGE 2
256-BYTE PAGE 1
A2 A1 A0
0
1
1
0
1
0
0
0
1
0
0
0
Fig 3. Device addressing.
PCF8598C-2
DEVICE 2
256-BYTE PAGE 4
1
1
1
256-BYTE PAGE 3
1
1
0
256-BYTE PAGE 2
1
0
1
256-BYTE PAGE 1
1
0
0
002aaa256
9397 750 14219
Product data
Rev. 06 — 22 October 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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