PCF85103C2D 查看數據表（PDF） - Philips Electronics
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PCF85103C2D Datasheet PDF : 20 Pages
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Philips Semiconductors
6. Pinning information
6.1 Pinning
PCF85103C-2
256 × 8-bit CMOS EEPROM with I2C-bus interface
A0 1
A1 2
A2 3
VSS 4
Fig 2. Pin configuration.
8 VDD
7 N.C.
6 SCL
5 SDA
002aaa251
6.2 Pin description
Table 3:
Symbol
A0
A1
A2
VSS
SDA
SCL
N.C.
VDD
Pin description
Pin
1
2
3
4
5
6
7
8
Description
address input 0
address input 1
address input 2
negative supply voltage
serial data input/output (I2C-bus)
serial clock input (I2C-bus)
no connect
positive supply voltage
7. Device addressing
Table 4: Device address code
Selection
Device code
Bit
b7[1]
b6
b5
b4
Device
0
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, A1, A0 are hardware selectable pins.
A system could have up to eight PCF85103C-2 devices on the same I2C-bus,
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’
when connected to VDD, logic level ‘0’ when connected to GND). Figure 3 shows the
various address combinations.
9397 750 09646
Product data
Rev. 02 — 09 May 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
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