se97b NXP Semiconductors, se97b Datasheet - Page 15

• Manufacturer Part Number: se97b
• Description: Ddr Memory Module Temp Sensor With Integrated Spd
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SE97B_1
Product data sheet
Fig 9.
SDA
SDA
SCL
SCL
START
by host
S
A = ACK = Acknowledge bit. A = NACK = No Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
SMBus/I
D15
A6
1
1
7.10 EEPROM operation
2
D14
A5
C-bus word read from register with a pre-set pointer
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 10. EEPROM partitioning
D12
A3
4
4
no write protect
D11
write protect
A2
5
5
by software
D10
A1
6
6
A0
D9
7
7
Rev. 01 — 27 January 2010
FFh
7Fh
0Fh
80h
00h
00h 01h
D8
R
8
8
by device
by host
DDR memory module temp sensor with integrated SPD
ACK
ACK
A
A
9
9
(cont.)
(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. 2010. All rights reserved.
16 pages or
256 bytes
D0
8
002aac812
SE97B
by host
NACK
Figure 10
A
9
002aac687
STOP
15 of 53
P