se98pw NXP Semiconductors, se98pw Datasheet - Page 9

• Manufacturer Part Number: se98pw
• Description: Se98 So-dimm Smbus/i2c-bus Temperature Sensor
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SE98_2
Product data sheet
Fig 7. SMBus/I
Fig 8. SMBus/I
SDA
SDA
SCL
SCL
SDA
SCL
by host
START
by host
START
S
A = ACK = Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
A = ACK = Acknowledge bit. W = Write bit = 0. R = Read bit = 1.
S
D15
A6
A6
1
1
1
2
2
C-bus write to the Pointer register
D14
C-bus write to the Pointer register followed by a write data word
A5
A5
2
2
2
most significant byte data
device address and write
device address and write
The data byte has the most significant bit first. At the end of a read, this device can accept
either Acknowledge (ACK) or No Acknowledge (NACK) from the Master (No Acknowledge
is typically used as a signal for the slave that the Master has read its last byte). It takes this
device 125 ms to measure the temperature. Refer to the timing diagrams in
Figure
D13
A4
A4
3
3
3
D12
A3
A3
4
4
4
8,
Figure 9
D11
A2
A2
5
5
5
D10
A1
A1
6
6
6
and
D9
A0
A0
7
7
7
Rev. 02 — 7 January 2008
Figure 10
D8
W
W
8
8
8
by device
by device
by device
ACK
ACK
ACK
A
A
9
9
9
A
on how to program the device.
D7
D7
D7
1
1
1
SO-DIMM SMBus/I
D6
D6
D6
2
2
2
D5
D5
D5
3
3
least significant byte data
3
write register address
register address
D4
D4
D4
4
4
4
D3
D3
D3
5
5
5
2
C-bus temperature sensor
D2
D2
D2
6
6
6
D1
D1
D1
7
7
7
© NXP B.V. 2008. All rights reserved.
D0
D0
D0
8
8
8
by device
by device
by device
ACK
Figure
ACK
ACK
A
A
A
9
9
9
SE98
002aab412
002aab308
(cont.)
(cont.)
by host
STOP
STOP
7,
P
P
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