UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 579

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

Figure 20-22 Macro Service Data Transfer Processing Flow (Type A)
(Vectored Interrupt Request Generation)
Read buffer contents, then transfer
read data to specified SFR
Read channel pointer contents (m)
Clear ( 0 ) interrupt processing
mode bit (ISM)
Read SFR pointer contents
Determine transfer direction
Calculate buffer address*
Read contents of macro
Determine channel type
Read MSC contents (n)
Macro service request
service mode register
acknowledgment
MSC
MSC = 0?
VCIE = 1?
CHAPTER 20 INTERRUPT FUNCTIONS
End
MSC-1
No
Yes
TYPE A
Memory
SFR
Other
SFR
No
Yes
To Other Macro Service Processing
Clear ( 0 ) interrupt request
flag (IF)
*
Specified SFR contents, then
transfer read data to buffer
1-byte transfer: m-n-1
2-byte transfer: m-n 2-1
Memory
End
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