参数资料
型号: X40411S8I-C
元件分类: 电源管理
英文描述: 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
封装: PLASTIC, SOIC-8
文件页数: 5/25页
文件大小: 532K
代理商: X40411S8I-C
X40410/X40411/X40414/X40415
Characteristics subject to change without notice.
13 of 25
REV 1.3.6 2/11/04
www.xicor.com
– One bit of the slave command byte is a R/W bit. The
R/W bit of the Slave Address Byte denes the opera-
tion to be performed. When the R/W bit is a one, then
a read operation is selected. A zero selects a write
operation.
Word Address
The word address is either supplied by the master or
obtained from an internal counter. The internal counter
is undened on a power up condition.
Operational Notes
The device powers-up in the following state:
– The device is in the low power standby state.
– The WEL bit is set to ‘0’. In this state it is not possible
to write to the device.
–SDA pin is the input mode.
– RESET/RESET Signal is active for tPURST.
Data Protection
The following circuitry has been included to prevent
inadvertent writes:
– The WEL bit must be set to allow write operations.
– The proper clock count and bit sequence is required
prior to the stop bit in order to start a nonvolatile write
cycle.
–A three step sequence is required before writing into
the Control Register to change Watchdog Timer or
Block Lock settings.
Figure 16. Sequential Read Sequence
Data
(2)
S
t
o
p
Slave
Address
Data
(n)
A
C
K
A
C
K
SDA Bus
Signals from
the Slave
Signals from
the Master
1
Data
(n-1)
A
C
K
A
C
K
(n is any integer greater than 1)
Data
(1)
Figure 15. Random Address Read Sequence
0
Slave
Address
Byte
Address
A
C
K
A
C
K
S
t
a
r
t
S
t
o
p
Slave
Address
Data
A
C
K
1
S
t
a
r
t
SDA Bus
Signals from
the Slave
Signals from
the Master
10 1
0
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