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33800 Datasheet(PDF) 30 Page - Freescale Semiconductor, Inc

Part # 33800
Description  Engine Control Integrated Circuit
PDF  39 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33800 Datasheet(HTML) 30 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
30
Freescale Semiconductor
33800
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Calibration Command
In cases where an accurate time base is required, the user
may calibrate the internal timers using the calibration
command (refer to Table 5). After the 33800 device receives
the calibration command, the device expects a 32
µs logic[0]
calibration pulse on the CS pin. The pulse is used to calibrate
the internal clock. SPI communication is allowed during
calibration. Because the oscillator frequency changes with
temperature, calibration is required for an accurate time
base. The calibration command may be used to update the
device on a periodic basis.
Reset Command
The reset command resets all registers to Power-ON
Reset (POR) state. Refer to Table 22, on page 30, for POR
states or the paragraph entitled Power-ON Reset (POR) on
page 19 of this datasheet.
.
Table 19. CCD2 Dither Frequency Select
Bits 3210
Dither Frequency
0000
Dither Off
0001
50Hz
0010
100Hz
0011
150Hz
0100
200Hz
0101
250Hz
0110
300Hz
0111
350Hz
1000
400Hz
1001
450Hz
1010
500Hz
1011
133Hz
1100
166Hz
1101
233Hz
1110
266Hz
1111
No change
Notes: Frequencies above 250Hz are +- 20% -
assumes part is calibrated
Table 20. CCD2 Dither Amplitude Select
Bits 456
Dither Amplitude
000
Dither Off
001
21.8mA
010
32.7mA
011
43.6mA
100
54.5mA
101
65.4mA
110
75.3mA
111
87.2mA
Table 21. Calibration Command
Command
Control Address
Command Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Calibration Command
1
1
0
1
0
X
X
X
X
X
X
X
X
X
X
X
Table 22. Reset Command
Command
Control Address
Command Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
1
1
0
1
1
X
X
X
X
X
X
X
X
X
X
X
Next SO Response
(Message 1)
0 = No Fault, 1 =
Fault
OvrVlt
,TLim
or
CAL
Flt
Reset Fault
Status
PWM
6
Fault
Status
PWM
5
Fault
Status
PWM
4
Fault
Status
PWM
3
Fault
Status
PWM
2
Fault
Status
PWM
1
Fault
Status
OUT8
Fault
Status
OUT7
Fault
Status
OUT6
Fault
Status
OUT5
Fault
Status
OUT4
Fault
Status
OUT3
Fault
Status
OUT2
Fault
Status
OUT1



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