Table of Contents
Advertisement
13.5.3
Pause-conversion mode
In the pause-conversion mode, A/D conversion starts and pauses repeatedly for each
channel.When the start trigger is input after the A/D conversion pauses at the
termination of the A/D conversion for the end channel, A/D conversion is continued
after returning to the start channel.
I Setting of Pause-conversion Mode
Operating the 8-/10-bit A/D converter in the pause-conversion mode requires the setting shown in Figure
13.5-3.
ADCS
ADCR
ADER
: Unused
: Used bit
: Setting "1" to corresponding bit using as analog input pin
: Setting "1"
1
0
: Setting "0"
I Operation of Pause-conversion Mode
• When the start trigger is input, A/D conversion starts at the channel set by the A/D conversion start
channel select bits (ANS2 to ANS0).The A/D conversion pauses at the termination of the A/D
conversion for one channel.When the start trigger is input while A/D conversion pauses, A/D
conversion for the next channel is performed.
• The A/D conversion pauses at the termination of the A/D conversion for the channel set by the A/D
conversion end channel select bits (ANE2 to ANE0). When the start trigger is input while A/D
conversion pauses, A/D conversion is continued after returning to the channel set by the A/D conversion
start channel select bits (ANS2 to ANS0).
• To restart this mode while A/D conversion pauses, input the start trigger set by the A/D start trigger
select bits in the A/D control status register (ADCS: STS1, STS0).
• To terminate A/D conversion forcibly, write "0" to the A/D conversion-on flag bit in the A/D control
status register (ADCS: BUSY).
• This mode cannot be restarted during A/D conversion.
Figure 13.5-3 Setting of Pause-conversion Mode
bit15 14 13 12 11 10
BUSY NT INTE
PAUS STS1
STS0
S10 ST1 ST0
CT1 CT0
CHAPTER 13 8/10-bit A/D converter
9 bit8 bit7 6
5
4
Re-
STRT
MD1 MD0 ANS2
ANS1 ANS0
served
0
1
1
D9 D0 (hold the conversion result)
3
2
1 bit0
ANE2
ANE1 ANE0
373
Advertisement
Table of Contents
