Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
31-29
Preliminary
NOTE
If TBC_CLK_PS is not set to disabled, it must not be changed to any other
value besides disabled. If TBC_CLK_PS is set to disabled it can be changed
to any other value.
31.3.4.3
ADC Time Base Counter Registers (ADC_TBCR)
The ADC_TBCR contains the current value of the time base counter. ADC_TBCR can be accessed by
configuration commands sent to ADC0.
Table 31-21. ADC_TSCR Field Descriptions
Field
Description
0–11
Reserved.
TBC_
CLK_PS
Time Base Counter Clock Prescaler. Contains the system clock divide factor for the time base counter. It controls
the accuracy of the time stamp. The prescaler is disabled when TBC_CLK_PS is set to 0b0000.
Table 31-22. Clock Divide Factor for Time Stamp
TBC_CLK_PS
System Clock Divide
Factor
Clock to Time Stamp
Counter for a 66 MHz
System Clock (MHz)
0b0000
Disabled
Disabled
0b0001
1
66
0b0010
2
33
0b0011
4
16.5
0b0100
6
11
0b0101
8
8.25
0b0110
10
6.60
0b0111
12
5.50
0b1000
16
4.13
0b1001
32
2.06
0b1010
64
1.03
0b1011
128
0.52
0b1100
256
0.26
0b1101
512
0.13
0b1110–0b1111
Reserved
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