NEC PD78214 - Manual (Page 266)

237
Chapter 8 A/D Converter
8
Fig. 8-11 Select-Mode A/D Conversion Started by Hardware
ANn ANn ANn ANn ANn ANm ANm
ANm ANn ANn ANn
INTP5 pin input
(rising edge valid)
A/D conversion Standby state
ADM writing
CS
←1, TRG←1
ADM writing
CS
←1, TRG←1
ADCR
INTAD
INTAD accepted
Standby state
Remark n = 0, 1, ..., 7
m = 0, 1, ..., 7
(2) Scan-mode A/D conversion
When A/D conversion is started, the analog signal input to the AN0 pin is converted. When one conversion
sequence is completed, the signal from the next analog input pin is converted. Each time a conversion
sequence is completed, an interrupt request (INTAD) is generated.
When a valid edge arrives at the INTP5 pin during A/D conversion, the current conversion sequence is stopped,
and another conversion session is started for the signal at the AN0 pin.