FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 19. CCD2 Dither Frequency Select
Table 20. CCD2 Dither Amplitude Select
Bits 3210
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Dither Frequency
Dither Off
50Hz
Bits 456
000
Dither Amplitude
Dither Off
21.8mA
001
100Hz
010
32.7mA
150Hz
011
43.6mA
200Hz
100
54.5mA
250Hz
101
65.4mA
300Hz
110
75.3mA
350Hz
111
87.2mA
400Hz
Calibration Command
450Hz
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 32µs 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.
500Hz
133Hz
166Hz
233Hz
266Hz
No change
Notes: Frequencies above 250Hz are +- 20% -
assumes part is calibrated
Table 21. Calibration Command
Command
Control Address
Command Bits
15
14
1
13
0
12
1
11
0
10
X
9
8
7
6
5
4
3
2
1
0
Calibration Command
1
X
X
X
X
X
X
X
X
X
X
Reset Command
states or the paragraph entitled Power-ON Reset (POR) on
page 19 of this datasheet.
The reset command resets all registers to Power-ON
Reset (POR) state. Refer to Table 22, on page 30, for POR
.
Table 22. Reset Command
Command
Control Address
Command Bits
15
1
14
1
13
0
12
1
11
1
10
X
9
8
7
6
5
4
3
2
1
0
Reset
X
X
X
X
X
X
X
X
X
X
Next SO Response
(Message 1)
0 = No Fault, 1 =
Fault
OvrVlt Reset Fault Fault Fault Fault Fault Fault Fault Fault Fault Fault Fault Fault Fault Fault
,TLim
or
Status Status Status Status Status Status Status Status Status Status Status Status Status Status
PWM PWM PWM PWM PWM PWM OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1
CAL
Flt
6
5
4
3
2
1
33800
Analog Integrated Circuit Device Data
Freescale Semiconductor
30
FREESCALE [ Freescale ]
