mc33789 Freescale Semiconductor, Inc, mc33789 Datasheet - Page 56

• Manufacturer Part Number: mc33789
• Description: Airbag System Basis Chip Sbc With Power Supply And Psi5 Sensor Interface
• Manufacturer: Freescale Semiconductor, Inc

FUNCTIONAL DEVICE OPERATION
SENSOR MESSAGE, OPERATION COMMAND AND SPI
Analog Interface SPI Commands
AI_CONTROL (0x52, 0x92)
source to be routed to the analog diagnostics output AOUT
56
33789
Table 20. SPI Command - AI_CONTROL
The AI_CONTROL command selects an analog voltage
Write
Read
Default
→
SO
SO
SI
SI
15
AIC4
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
1
0
0
1
AIC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
13
0
1
0
0
AIC2
12
P
P
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
11
0
1
0
1
ACIC1
AI_CONTROL (0X52, 0X92)
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
10
0
1
0
1
AIC0
Analog Interface Request Bits
9
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
8
0
0
0
0
pin. The lower 5 bits of the command are used for the
selection to form the multiplexed analog measurement.
SPI update, or a DIAG_CLR SPI command, or an internal
reset occurs. The response indicates the current state of the
analog interface control.
HEX
$0C
$0D
$1C
$1D
$00
$01
$02
$03
$04
$05
$06
$07
$08
$09
$0A
$0B
$0E
$0F
$10
$11
$12
$13
$14
$15
$16
$17
$18
$19
$1A
$1B
$1E
$1F
The AI_CONTROL command is latched until a subsequent
X
X
0
0
RSENSE
VERDIAG
VPWR
VBST
VER
VBUCK
VSYNC
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
Unused (High-Z-output)
OUT1-D
OUT1-S
OUT2-D
OUT2-S
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
Unused (High-Z-output)
X
0
X
0
X
0
X
0
AIC4
AIC4
AIC4
Function
Analog Integrated Circuit Device Data
X
AIC3
AIC3
AIC3
X
Freescale Semiconductor
AIC2
AIC2
AIC2
X
AIC1
AIC1
AIC1
X
Multiplier
÷ 5.6
÷ 8.5
÷ 8.5
÷ 2.8
÷ 5.6
÷ 5.6
÷ 5.6
÷ 5.6
x 5
÷ 5
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 1
AIC0
AIC0
AIC0
X