se97pw/1 NXP Semiconductors, se97pw/1 Datasheet - Page 11

• Manufacturer Part Number: se97pw/1
• Description: Se97 Memory Module Temp Sensor With Integrated Spd
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SE97_2
Product data sheet
Fig 10. SMBus/I
SDA
SDA
SCL
SCL
START
by host
A = ACK = Acknowledge bit. A = NACK = No Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
S
D15
A6
1
1
7.10 EEPROM operation
2
C-bus word read from register with a pre-set pointer
D14
A5
2
2
returned most significant byte data
device address and read
The 2-kbit EEPROM is organized as either 256 bytes of 8 bits each (byte mode), or
16 pages of 16 bytes each (page mode). Accessing the EEPROM in byte mode or page
mode is automatic; partial page write of 2 bytes, 4 bytes, or 8 bytes is also supported.
Communication with the EEPROM is via the 2-wire serial I
provides an overview of the EEPROM partitioning.
D13
A4
3
3
Fig 11. EEPROM partitioning
D12
A3
4
4
no write protect
D11
A2
write protect
5
5
by software
D10
A1
6
6
D9
A0
7
7
Rev. 02 — 12 October 2007
FFh
7Fh
0Fh
80h
00h
00h 01h
D8
R
8
8
by device
by host
ACK
ACK
A
9
A
9
(cont.)
Memory module temp sensor with integrated SPD
(cont.)
D7
1
D6
2
returned least significant byte data
D5
07h
3
D4
1 page
or 16 bytes
4
D3
5
2
C-bus or SMBus.
D2
8 pages or
128 bytes
6
D1
7
© NXP B.V. 2007. All rights reserved.
16 pages or
256 bytes
D0
8
002aac812
by host
NACK
Figure 11
A
9
SE97
002aac687
STOP
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