16 FN7902.0 August 19, 2011 Write Operation A Write operation requires a START condition, followed by a valid Identification Byte, a v" />
參數(shù)資料
型號: ISL23328TFVZ
廠商: Intersil
文件頁數(shù): 8/20頁
文件大小: 0K
描述: IC DGTL POT 2CH 100K 14TSSOP
標準包裝: 960
系列: XDCP™
接片: 128
電阻(歐姆): 100k
電路數(shù): 2
溫度系數(shù): 標準值 45 ppm/°C
存儲器類型: 易失
接口: I²C(設備位址)
電源電壓: 1.2 V ~ 5.5 V,1.7 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 14-TSSOP
包裝: 管件
ISL23328
16
FN7902.0
August 19, 2011
Write Operation
A Write operation requires a START condition, followed by a valid
Identification Byte, a valid Address Byte, a Data Byte, and a STOP
condition. After each of the three bytes, the ISL23328 responds
with an ACK. The data is transferred from I2C block to the
corresponding register at the 9th clock of the data byte and the
device enters its standby state (see Figures 28 and 29).
It is possible to perform a sequential Write to all DCP channels
via a single Write operation. The command is initiated by sending
an additional Data Byte after the first Data byte instead of
sending a STOP condition.
Read Operation
A Read operation consists of a three byte instruction followed by
one or more Data Bytes (see Figure 30). The master initiates the
operation issuing the following sequence: a START, the
Identification byte with the R/W bit set to “0”, an Address Byte, a
second START, and a second Identification byte with the R/W bit
set to “1”. After each of the three bytes, the ISL23328 responds
with an ACK; then the ISL23328 transmits Data Byte. The master
terminates the read operation issuing a NACK (ACK) and a STOP
condition following the last bit of the last Data Byte (see
Figure 30).
SDA OUTPUT FROM
TRANSMITTER
SDA OUTPUT FROM
RECEIVER
8
1
9
START
ACK
SCL FROM
MASTER
HIGH IMPEDANCE
FIGURE 28. ACKNOWLEDGE RESPONSE FROM RECEIVER
S
T
A
R
T
S
T
O
P
IDENTIFICATION
BYTE
ADDRESS
BYTE
DATA
BYTE
A
C
K
SIGNALS FROM
THE MASTER
SIGNALS FROM
THE SLAVE
A
C
K
10
1
00
A
C
K
WRITE
SIGNAL AT SDA
00 0
A0
A1
FIGURE 29. BYTE WRITE SEQUENCE
A2
SIGNALS
FROM THE
MASTER
SIGNALS FROM
THE SLAVE
SIGNAL AT SDA
S
T
A
R
T
IDENTIFICATION
BYTE WITH
R/W = 0
ADDRESS
BYTE
A
C
K
A
C
K
10
1
00
S
T
O
P
A
C
K
1
IDENTIFICATION
BYTE WITH
R/W = 1
A
C
K
S
T
A
R
T
LAST READ
DATA BYTE
FIRST READ
DATA BYTE
A
C
K
00 0
A0
A1
A0
A1
FIGURE 30. READ SEQUENCE
A
C
K
A2
10 1 0
READ
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