SE97 Datasheet, PDF (14/54 Pages) NXP Semiconductors – DDR memory module temp sensor with integrated SPD, 3.3 V

NXP Semiconductors
SE97
DDR memory module temp sensor with integrated SPD, 3.3 V
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SCL
(cont.)
SDA
A6 A5 A4 A3 A2 A1 A0
D7 D6 D5 D4 D3 D2 D1 D0
(cont.)
S
WA
A
START
by host
device address and write
ACK
by device
write register address
ACK
by device
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SCL
SDA
D15 D14 D13 D12 D11 D10 D9
by host
most significant byte data
D8
D7 D6
A
ACK
by device
D5 D4 D3 D2 D1
least significant byte data
D0
A
P
ACK STOP
by device by host
002aab412
A = ACK = Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
Fig 10. SMBus/I²C-bus write to the Pointer register followed by a write data word
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SCL
(cont.)
SDA
A6 A5 A4 A3 A2 A1 A0
D7 D6 D5 D4 D3 D2 D1 D0
(cont.)
S
WA
A
START
by host
device address and write
ACK
by device
read register address
ACK
by device
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SCL
(cont.)
SDA
A6 A5 A4 A3 A2 A1 A0
SR
R
(cont.)
A
repeated
START
device address and read
ACK
by device
by host ₁
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SCL
SDA
D15 D14 D13 D12 D11 D10 D9
returned most significant byte data
D8
D7
A
ACK
by host
D6 D5 D4 D3 D2 D1
returned least significant byte data
D0
A
P
NACK STOP
by host by host
002aac686
A = ACK = Acknowledge bit. A = NACK = No Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
Fig 11. SMBus/I²C-bus write to Pointer register followed by a repeated START and an immediate data word read
SE97_5
Product data sheet
Rev. 05 — 6 August 2009
© NXP B.V. 2009. All rights reserved.
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