UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 603
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UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 603 of 759
- Download datasheet (3Mb)
(2) Configuration of macro service channel
(3) Example of using counter mode
Remark The internal RAM address in the figure above is the value when the LOCATION 0 instruction is executed.
The macro service channel consists of only a 16-bit macro service counter. The low-order 8 bits of the address of the
MSC are written to the channel pointer.
Here is an example of counting the number of edges input to external interrupt pin INTP5.
INTP5/P26
When the LOCATION 0FH instruction is executed, add 0F0000H to this value.
Macro Service Channel
OFE7EH
Figure 20-41 Counting Number of Edges
CHAPTER 20 INTERRUPT FUNCTIONS
INTP5 Macro Service Request
MSC 0EH
Figure 20-40 Counter Mode
Channel Pointer 7EH
Mode Register 00H
7
Macro Service
Counter (MSC)
(Internal RAM)
Internal Bus
High-Order 8 Bytes
Low-Order 8 Bytes
Channel Pointer
Mode Register
High-Order 8 Bytes
Low-Order 8 Bytes
Counter Mode
Interrupt request is generated when MSC = 0.
–1
0
High Addresses
Low Addresses
563
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