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| 型号： | MC33793 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | Distributed System Interface (DSI) Sensor Interface(分布式系统接口（DSI）传感器接口) |
| 中文描述： | 分布式系统接口（DSI）传感器接口（分布式系统接口（DSI）的传感器接口） |
| 文件页数： | 15/24页 |
| 文件大小： | 640K |
| 代理商： | MC33793 |
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33793
15
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 4
.
Initialization Response
This response message is sent during the next message
following a valid Initialization command to the addressed
device. The response is shown in
Table 5
. Because this is a
long-word only command, the short-word response is invalid.
Request Status Command
This command will cause the addressed device to return the
status of the NV, U, and BS bits and the logic levels of the I/O
and LOGICOUT. The command format is found in
Table 6
.
Table 4. Initialization Command Format
Data
Address
Command
CRC
NV
BS
G1
G0
PA3
PA2
PA1
PA0
A3
A2
A1
A0
0
0
0
0
X3
X2
X1
X0
Legend
A[3:0] = Address bits. The slave address.
BS = Bus Switch Position (1 = closed).
G[1:0] = Group bits (unused).
NV = Nonvolatile Memory Write. The value of the NV bit in the slave.
PA[3:0] = Bus Address to set the device to.
X[3:0] = Cyclic Redundancy Check (CRC). The CRC as calculated by the
master.
Table 5. Initialization Response Format
High Byte
Low Byte
CRC
A3
A2
A1
A0
0
0
0
BF
NV
BS
G1
G0
PA3
PA2
PA1
PA0
X3
X2
X1
X0
Legend
A[3:0] = Address bits. The slave address.
BF = Bus Fault. Bus out short to battery detected.
BS = Bus Switch Position (1 = closed).
G[1:0] = Group bits (unused).
NV = Nonvolatile Memory Write. The value of the NV bit in the slave.
PA[3:0] = Bus Address to set the device to.
X[3:0] = Cyclic Redundancy Check (CRC). The CRC as calculated by
the slave.
Table 6. Request Status Command Format
Data
Address
Command
CRC
–
–
–
–
–
–
–
–
A3
A2
A1
A0
0
0
0
1
X3
X2
X1
X0
Legend
A[3:0] = Address bits. The address of the selected device. An
address value of "0000" is ignored by all devices.
X[3:0] = Cyclic Redundancy Check (CRC). The CRC as calculated
by the master.
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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| MC33793D | 功能描述:IC DSI SLAVE FOR R-SENSE 16-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| MC33793DR2 | 功能描述:IC DSI SLAVE FOR R-SENSE 16-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
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| MC33794DHR2 | 制造商:Rochester Electronics LLC 功能描述:OCCUPANT DETECT E-FIELD SENSOR FOR MCU SUPPORT - Bulk |
| MC33794DWB | 功能描述:IC SENSOR ELECTRIC FIELD 54-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
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