33810_10 Datasheet, PDF (27/35 Pages) Freescale Semiconductor, Inc – Automotive Engine Control IC

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Table 19. InjectorDriver Diagnostics
Program State Fault
Fault Bits
Off
State
Open
Load
Pull
Dwn
On
State
Open
Load
En Bit
Output
Driver STB
On/Off STG
OPEN
OUTx
Batt
Short
Fault
OUTx
OFF
Open
Fault
OUTx
ON
Open
Fault
Fault Reported
0
X Off STB 0
0
0 ^{No Fault}
0
X Off STG 0
0
0 ^{No Fault}
0
X Off OPEN 0
0
0 ^{No Fault}
1
X Off STB 0
0
0 ^{No Fault}
1
X Off STG 0
1
0 ^{Open Load}
1
X Off OPEN 0
1
0 ^{Open Load}
temperature, calibration is required for an accurate time
base. The calibration command should be used to update the
device on a periodic basis.
SPI COMMAND SUMMARY
The SPI commands are defined as 16 bits with 4 address
control bits and 12 command data bits. There are 12 separate
commands that are used to set operational parameters of
device. The operational parameters are stored internally in
16 bit registers.
Table 20 defines the commands and default state of the
internal registers at POR. SPI commands may be sent to the
device at any time in NORMAL STATE.
Messages sent are acted upon on the rising edge of the
CS input.
X
0 On STB 1
0
0 ^{Short to Batt}
X
0 On STG 0
0
0 ^{No Fault}
X
0 On OPEN 0
0
0 ^{No Fault}
X
1 On STB 1
0
0 Short to Batt
X
1 On STG 0
0
1 Open Load
X
1 On OPEN 0
0
1 Open Load
CLOCK CALIBRATION COMMAND
In cases where an accurate time base is required, the user
must calibrate the internal timers using the clock calibration
command (refer to Table 20). After the 33810 device
receives the calibration command, the device expects to
receive a 32μs logic [0] calibration pulse on the CS pin. The
pulse is used to calibrate the internal clock. Any SPI message
may be sent during the 32μs calibration chip select. Because
the oscillator frequency may shift up to 35% with
.
Table 20. SPI Command Message Set and Default State
Command
hex
Read Registers Command ₀
Control Address Bits
15 14 13 12
0 000
All Status Command
SPI Check Command
Mode Select Command
00 000
00 000
10 001
Command Bits
11 10 9 8 7 6 5 4 3 2 1 0
1 0 10
<0000>
0000
Internal Register Address
1 0 1000000000
1 1 1100000000
<0000>
<0> <0> X
IGN/GP Mode Select V10 OVR/
En Undr
Vtg
Set to IGN Mode Disab
X <0> <0> <0> <0>
pwm3 pwm2 pwm1 pwm0
EN EN EN EN
Disab Disab Disab Disab
Analog Integrated Circuit Device Data
Freescale Semiconductor
33810
27