UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 586

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) Example of use of type B
546
Buffer Area
Remark Macro service channel addresses in the figure are the values when the LOCATION 0 instruction is executed.
An example is shown below in which parallel data is input from port 3 in synchronization with an external signal. The
INTP4 external interrupt pin is used for synchronization with the external signal.
INTP4
P37
P36
P35
P34
P33
P32
P31
P30
When the LOCATION 0FH instruction is executed, 0F0000H should be added to the values in the figure.
Edge
Detection
0A01FH
0A000H
Port 3
Figure 20-27 Parallel Data Input Synchronized with External Interrupts
INTP4
Macro Service Request
64K Memory Space
CHAPTER 20 INTERRUPT FUNCTIONS
0FE6EH
Macro Service Control Word,
Macro Service Channel
Internal Bus
MSC
SFRP
MP
Channel Pointer 6EH
Mode Register 18H
(Internal RAM)
03H*
A0H
00H
20H
00H
00H
* Low-Order 8 Bits of Port 3 Address
Type B, SFR
Interrupt Request Generation when
MSC = 0
+1
–1
Memory, 8-Bit Transfer,