8/10-Bit A/D Converter Control Register 2 (Adc2) - Fujitsu 8FX Hardware Manual

MB95630H Series
15.6.2

8/10-bit A/D Converter Control Register 2 (ADC2)

The 8/10-bit A/D converter control register 2 (ADC2) is used to control different
functions of the 8/10-bit A/D converter, select the input clock, and enable and
disable interrupts.
■ Register Configuration
bit 7
Field AD8
Attribute R/W
Initial value 0
■ Register Functions
[bit7] AD8: Precision select bit
This bit selects the resolution of A/D conversion.
Writing "0" to this bit selects10-bit precision.
Writing "1" to this bit selects 8-bit precision. Reading the ADDL register can obtain 8-bit data.
bit7
Writing "0"
Writing "1"
Note: The data bits to be used are different depending on the resolution selected. Modify this bit only when
the A/D converter has stopped operating.
[bit6:5] TIM[1:0]: Sampling time select bits
These bits select the sampling time.
Modify the sampling time according to operating conditions (voltage and frequency).
The CKIN value is determined by the clock select bits (ADC2:CKDIV[1:0]).
bit6:5
Writing "00"
Writing "01"
Writing "10"
Writing "11"
Note: Modify these bits only when the A/D converter has stopped operating.
[bit4] ADCK: External start signal select bit
This bit selects the start signal for external start (ADC2:EXT = 1).
bit4
Writing "0"
Writing "1"
MN702-00009-2v0-E
6 5
TIM1 TIM0
R/W R/W
0 0
10-bit precision
8-bit precision
CKIN 4
CKIN 7
CKIN 10
CKIN 16
Selects not using any external start signal to start the A/D conversion function.
Selects the 8/16-bit composite timer ch. 0 output pin (TO00) as the pin used to start the A/D
conversion function.
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER 15 8/10-BIT A/D CONVERTER
4 3
ADCK ADIE
R/W R/W
0 0
Details
Details
Details
15.6 Registers
2 1
EXT CKDIV1 CKDIV0
R/W R/W
0 0
0
R/W
0
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