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33784 датащи(PDF) 22 Page - Freescale Semiconductor, Inc

номер детали 33784
подробное описание детали  DSI 2.02 Sensor Interface
PDF  30 Pages
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производитель  FREESCALE [Freescale Semiconductor, Inc]
домашняя страница  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33784 датащи(HTML) 22 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
22
Freescale Semiconductor
33784
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Figure 14. I/O Control Command and Response Format
REQUEST ID COMMAND AND RESPONSE
This command will cause the device ID information to be
read from internal storage and returned to the master. The
command format is found in Figure 15.
The response is sent during the next message following a
valid Request ID command to the addressed device.
Because this is a long-word only command, there is no short
word response.
The 33784 will only act on this command if the address bits
in the command match with the address that the device was
initialized. If the addresses do not match, the device will do
nothing and no response will be generated.
Figure 15. Request ID Command and Response Format
Data
Address
Command
Word Type
–
L2
L1
L0
–
DR2 DR1 DR0
A3
A2
A1
A0
0011
LW & ELW
Not Valid
SW & ESW (8-bit)
Not Valid
ESW (10-bit)
Response
Word Type
A3
A2
A1
A0
00000
L2
L1
L0
0
DR2 DR1 DR0
LW & ELW
No Response
SW & ESW (8-bit)
No Response
ESW (10-bit)
Legend
A[3:0] = Address bits.
DR[2:0] = I/O direction bits. 1 = Output. All bits are set to 0
by reset/clear.
“–” = Don’t care bit. Can be 0 or 1.
L[2:0] = Level to output on I/O if configured as outputs.
Data
Address
Command
Word Type
––––––––
A3
A2
A1
A0
0100
LW & ELW
Not Valid
SW & ESW (8-bit)
Not Valid
ESW (10-bit)
Response
Word Type
A3
A2
A1
A0
0000
V3
V2
V1
V0
000
FPA
R
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.
“–” = Don’t care bit. Can be 0 or 1.
V[3:0] = Device version number. The silicon version
number of the device. V0 always = 0, indicating MC33784
FPAR = Some parameters in the device are trimmed by
fuses. Since these parameters can be impacted by the
state of the fuses a fuse parity is calculated and stored
during device manufacturing. When the device is powered
up the current fuse parity is checked against the stored
parity. If they do not match this bit is set.



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