NEC PD78214 - Manual (Page 359)

330
µ
PD78214 Sub-Series
(3) Example of using the type B macro service
The following example shows how parallel data is input from port 3 in synchronization with an external signal.
The external signal is input to the external interrupt pin (INTP4).
Fig. 12-23 Parallel Data Input in Synchronization with an External Interrupt
Fig. 12-24 Parallel Data Input Timing
Data input (macro service)
Port 3
INTP4
0A000H
0A01FH
(Internal RAM)
–1
Type B: Memory → SFR
Internal bus
0FECFH
Mode register
Channel pointer
A1
CF
MSC
SFRP
MPL (low)
MPH (high)
00
A0
20
03 Note
+1
64K memory space
Buffer area
P37/TO3
P36/TO2
P35/TO1
P34/TO0
P33/SO/SB0
P32/SCK
P31/TxD
P30/RxD
Port 3
Edge detector
INTP4
Macro service
request
P25/INTP4/ASCK
Note Port 3 address