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| 型号： | MC33793D |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 7/27页 |
| 文件大小： | 0K |
| 描述： | IC DSI SLAVE FOR R-SENSE 16-SOIC |
| 标准包装： | 48 |
| 类型： | 分布式系统接口 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | 并联 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 管件 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
15
33793
FUNCTIONAL DEVICE OPERATION
DSI COMMANDS AND RESPONSES
DSI COMMANDS AND RESPONSES
INITIALIZATION COMMAND
The Initialization command must be sent to the 33793 before
it may commence communications over the bus. The
command may be used three ways. The first is to initialize a
programmable address device. The second is the first step in
assigning a pre-programmed address. The third is to initialize
a pre-programmed device.
For the first case this command is sent to address zero with
the NV bit set to zero. The command will be received by the
next daisy chain device with its bus switch open. Reception
of this command will assign the device address and group
number.
For the second case the Initialization command is sent the
same as the first except that the NV bit is set to one.
Reception of the command will assign the device address
and group number. A Read/Write NVM command then may
be sent to complete the setting of a pre-programmed
address.
A pre-programmed device must be initialized by putting its
address in both PA3:PA0 and A3:A0 fields.
Once a device has received an initialization command, it will
ignore further initialization commands unless it has received
a Clear command or undergone a power-up reset.
If BS = 1 and no faults are detected, initialization will cause
the bus switch to close.
The command format is found in Table 9.
Table 8. Short-word Response Summary
Command
Description
Response
0000
Initialization
Not Valid
0001
Request Status
NV
U
LO
BS
IO3
IO2
IO1
IO0
0010
Request Value
0
B7
B6
B5
B4
B3
B2
B1
B0
0011
I/O Control
Not Valid
0100
Request ID Information
V2
V1
V0
0
1
0101
Request Value
1
B7
B6
B5
B4
B3
B2
B1
B0
0110
Request Value
2
B7
B6
B5
B4
B3
B2
B1
B0
0111
Clear
No Response
1000
Request Value
3
B7
B6
B5
B4
B3
B2
B1
B0
1001
Read/Write NVM
Not Valid
1010
Reserved
1011
Reserved
1100
Clear Logic Out
NV
U
LO
BS
IO3
IO2
IO1
IO0
1101
Set Logic Out
NV
U
LO
BS
IO3
IO2
IO1
IO0
1110
Reserved
1111
Reverse Initialization
Not Valid
Legend
B[7:0] = 8-bit A/D value.
BS = Status of the Bus Switch (1 = close).
LO = Logic Out level at the Logic Out pin.
IO[3:0] = Logic level of I/O.
NV = Allows nonvolatile address programming if set to “1”.
PA[3:0] = Bus Address to set the device to.
U = Undervoltage Flag.
V[2:0] = Version number.
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