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| 型号： | MC33793DR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 9/27页 |
| 文件大小： | 0K |
| 描述： | IC DSI SLAVE FOR R-SENSE 16-SOIC |
| 标准包装： | 1 |
| 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： | 剪切带 (CT) |
| 其它名称： | MC33793DR2CT |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
17
33793
FUNCTIONAL DEVICE OPERATION
DSI COMMANDS AND RESPONSES
REQUEST VALUE n COMMAND
This command will cause the analog level at one of the four
I/O lines to be measured and returned on the following
command. The command format is found in Table 13. The
analog input measured is defined in Table 14.
REQUEST VALUES RESPONSE
This response is an 8-bit value representing the value
measured by the ADC. The selection of “n” is a function of the
command. This is shown in Table 15.
The read will be completed during the idle period and will
represent the voltage at the end of the command. If an
undervoltage condition exists at any time during the
command or the measurement has not completed properly, a
value of “00000000” will be returned. This is a reserved value
to indicate a problem with the measurement. The minimum
valid level reported will be “00000001”. No response is
generated if the command address field was $0.
I/O CONTROL COMMAND
This register controls the I/O ports. When the “DR” bits are
set, the corresponding I/O is enabled as an output. The “L” bit
settings control the level of the corresponding I/O if it is
enabled as an output. The format of this command is shown
in Table 16.
I/O CONTROL RESPONSE
The response indicates which I/O has been configured as
outputs and their current values.
The values returned will be the values programmed. The
values at the pins will not be the ones that were programmed
if the pin has been forced to the opposite state. The response
format is shown in Table 17. No response is generated if the
command address field was $0.
Table 13. Request Value n Command Format
Data
Address
Command
CRC
–
A3
A2
A1
A0
C3
C2
C1
C0
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.
C[3:0] = Command number.
X[3:0] = Cyclic Redundancy Check (CRC). The CRC as calculated by the
master.
Table 14. Analog Input Selection
Command
A/D Input
0010
I/O0
0101
I/O1
0110
I/O2
1000
I/O3
Table 15. Request Values Response Format
High Byte
Low Byte
CRC
A3
A2
A1
A0
0
D7
D6
D5
D4
D3
D2
D1
D0
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.
D[7:0] = Measured value (MSB = D7).
X[3:0] = Cyclic Redundancy Check (CRC).
Table 16. I/O Control Command Format
Data
Address
Command
CRC
L3
L2
L1
L0
DR3
DR2
DR1
DR0
A3
A2
A1
A0
0
1
X3
X2
X1
X0
Legend
A[3:0] = Address bits.
DR[3:0] = I/O direction bits. 1 = Output. All bits are set to “0” by
reset/clear.
L[3:0] = Level to output on I/O if configured as output. All bits are set to “0”
by reset/clear
X[3:0] = Cyclic Redundancy Check (CRC). The CRC as calculated by the
master.
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