参数资料
型号: LTC4245IUHF#PBF
厂商: Linear Technology
文件页数: 23/36页
文件大小: 431K
描述: IC CNTRLR HOT SWAP 38-QFN
标准包装: 52
类型: 热交换控制器
应用: CompactPCI?
内部开关:
电源电压: 3.3V,5V,12V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 38-WFQFN 裸露焊盘
供应商设备封装: 38-QFN(5x7)
包装: 管件
LTC4245
23
4245fa
APPLICATIO  S I FOR  ATIO
U
U
U
Figure 12. LTC4245 Serial Bus SDA Write Byte Protocol
S
W
ADDRESS
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
COMMAND
A
A
DATA
A
P
0 1 a4:a0   0    0    xxx b4:b0    0   b7:b0   0
4245 F12
A : ACKNOWLEDGE (LOW)
A : NOT ACKNOWLEDGE (HIGH)
R : READ BIT (HIGH)
W : WRITE BIT (LOW)
S :  START CONDITION
P :  STOP CONDITION
Figure 16. LTC4245 Serial Bus SDA Alert Response Protocol
S
R
ALERT
RESPONSE
ADDRESS
DEVICE
ADDRESS
A
A
P
0001100
1    0
01 a4:a0 0
1
4245 F16
Figure 15. LTC4245 Serial Bus SDA Read Word Protocol
S
S
R
W
ADDRESS
COMMAND
A
A
DATA
A
P
0 1 a4:a0
ADDRESS
0 1 a4:a0
0    0    xxx b4:b0    0
A
0
A
0
1
b7:b0
DATA
b7:b0   1
Figure 14. LTC4245 Serial Bus SDA Read Byte Protocol
S
S
R
W
ADDRESS
COMMAND
A
A
DATA
A
P
0 1 a4:a0
ADDRESS
0 1 a4:a0
0    0    xxx b4:b0    0
A
0
1
b7:b0   1
4245 F14
Figure 13. LTC4245 Serial Bus SDA Write Word Protocol
S
W
ADDRESS
COMMAND
A
A
DATA
A
0 1 a4:a0   0    0    xxx b4:b0    0   b7:b0
DATA
xxxxxxxx
0
A
P
0
4245 F13
SCL
SDA
START
CONDITION
STOP
CONDITION
ADDRESS
R/W
ACK
DATA
ACK
DATA
ACK
1 - 7
8
9
4245 F11
a6 - a0
b7 - b0
b7 - b0
1 - 7
8
9
1 - 7
8
9
P
S
Figure 11. Data Transfer over I
2
C or SMBus
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