Fujitsu MB90390 Series Hardware Manual page 324

CHAPTER 18 8/10-BIT A/D CONVERTER
■ Operation in Stop Conversion Mode
In stop conversion mode, the analog inputs from the channel specified by the ANS bits to the channel
specified by the ANE bits are sequentially converted with a pause after the conversion of each channel.
When the end channel specified by the ANE bits has been processed, A/D conversion, with pauses, starts
again with the channel specified by the ANS bits. If the start and end channels are the same (ANS = ANE),
the conversion of the channel specified by the ANS bits is repeated. To reactivate conversion during a
pause, generate the activation cause specified by the STS1 and STS0 bits.
The settings required for operation in stop conversion mod.
bit15 bit14
ADCS
BUSY INT
✧ ✧
ADCR
S10 ST1
✧ ✧
ADER
ADSEL
✧ ✦
✧ : Used during conversion.
✦ : Set the bit that corresponds to the used pin to "1".
0 : Set to "0".
1 : Set to "1".
Reference:
The following are sample conversion sequences in stop conversion mode:
(It is assumed that ADSEL = 0.)
ANS = 000
AN0 → Pause → AN1 → Pause → AN2 → Pause → AN3 → Pause → AN0 → Repeat
ANS = 110
AN6 → Pause → AN7 → Pause → AN0 → Pause → AN1 → Pause → AN2 → Pause → AN3
→ Pause→ AN6 → Repeat
ANS = 011
AN3 → Pause → AN3 → Pause → Repeat
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Figure 18.6-2 Settings for Stop Conversion Mode
bit13 bit12 bit11 bit10 bit9
INTE PAUS STS1 STS0 STRT
✧ ✧ ✧ ✧
ST0 CT1 CT0 -
✧ ✧ ✧
✦ ✦ ✦ ✦
, ANE = 011 :
B B
, ANE = 011 :
B B
, ANE = 011 :
B B
bit8 bit7 bit6 bit5
RESV MD1 MD0 ANS2
✧ ✧
0 1 1
Holds the conversion data.
✦ ✦ ✦ ✦ ✦
bit4 bit3 bit2 bit1 bit0
ANS1 ANS0 ANE2 ANE1 ANE0
✧ ✧ ✧ ✧
✦ ✦ ✦ ✦
✧
✦