LOGIC COMMANDS AND REGISTERS The response is" />
參數(shù)資料
型號(hào)： MCZ33784EFR2
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 11/30頁(yè)
文件大?。?/td> 0K
描述： IC SENSOR DBUS DSI 2.02 16-SOIC
標(biāo)準(zhǔn)包裝： 2,500
類(lèi)型： 傳感器接口
輸入類(lèi)型： 模擬
輸出類(lèi)型： 數(shù)字
接口： 總線
電流 - 電源： 4mA
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC N
包裝： 帶卷 (TR)
Analog Integrated Circuit Device Data
Freescale Semiconductor
19
33784
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
The response is sent during the next message following a
valid Request Status command to the addressed device.
Because this is a long-word only command, there is no short-
word response.
The I/O bits reflect the logic states of the I/O pins. These
states are latched into an internal register after the Request
Status command is received (approximately TBD
μs after the
bus rises above the frame threshold), and are held until the
response is transmitted. Any activity that occurs on the I/O
pins after the states are latched will be ignored.
Figure 10. Request Status Command and Response Format
REQUEST AN0 COMMAND AND RESPONSE
This command causes the analog voltage on the AN0 pin
to be measured and converted by the on-chip 10-bit ADC.
The approximate timing for the conversion following this
command is shown in Figure 11. The response to this
command depends on the format in which the command was
sent. The sensor data is sent in the format shown in Table 10.
The 33784 will only act on this command if the address bits
in the command match the address that the device was
initialized with. If the addresses do not match, the device will
do nothing and no response will be generated.
Data
Address
Command
Word Type
––––––––
A3
A2
A1
A0
0001
LW & ELW
Not Valid
SW & ESW (8-bit)
Not Valid
ESW (10-bit)
Response
Word Type
A3
A2
A1
A0
00000
BSH BSL
00
IO2
IO1
IO0
LW & ELW
No Response
SW & ESW (8-bit)
No Response
ESW (10-bit)
Legend
A[3:0] = Address bits. The address of the selected device.
An address value of 0000 is ignored by all devices.
BSH = High Side Bus switch position (1 = closed).
BSL = Low Side Bus switch position (1 = closed).
“–” = Don’t care bit. Can be 0 or 1.
IO[2:0] = Values at logic I/Os.
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