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Notes:
• A/D unit 1 uses the 2 channels AN8 and AN9, and A/D unit 2 uses the 2 channels AN10 and
AN11.
• Always write "0" to ANE1, ANE2, ANS2, and ANS1 of A/D units 1 and 2.
• Be sure to set A/D units 1 and 2 so that ANS0 is less than or equal to ANE0.
• When A/D conversion mode selection bit (MD1,MD0) is set to "00
during A/D conversion. Only software start (STS1,STS0="00
restart according to the following procedure.
1. Clear the INT bit to "0".
2. Write STRT bit to "1" and INT bit to "0" at the same time.
When A/D conversion mode selection bit (MD1,MD0) is set to "01
during the A/D conversion.
When restarting and termination of the A/D conversion occur at the same time, the A/D conversion is
terminated without restarting. And, value of "300
Therefore, please use restart so that neither the A/D conversion restarting nor the terminating
may occur at the same time.
■ Operation of Continuous Conversion Mode
In the continuous conversion mode, the analog inputs set by the ANS and ANE bits are sequentially
converted, the analog input set by the ANS bit is resumed at the end of conversion of the end channel set by
the ANE bit, and the A/D conversion operation is continued. If the start channel and end channel are
identical (ANS=ANE), conversion loops on the channel specified by ANS only. The settings shown in
Figure 14.6-2 are required in order to operate in continuous conversion mode.
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 bit7 bit6
ADCH/
-
-
ADMD
ADCS BUSY INT
-
-
ADCD
AICR
Figure 14.6-2 Setting at Continuous Conversion Mode
ANS2 ANS1 ANS0 ANE2 ANE1 ANE0 MD1
-
INTE PAUS S10
-
-
-
-
CHAPTER 14 8/10-BIT A/D CONVERTER
" is stored in data register (ADCR1/ADCR0).
H
MD0
1
0
Reser-
START
ved
0
Store the converting data
0: Set "0".
1: Set "1".
", restart can be operating
B
") can be set in this mode. Please
B
", restart can not be operating
B
bit5 bit4 bit3 bit2
STS1 STS0 CT1
CT0
bit1 bit0
ST1
ST0
343
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