Table of Contents
Advertisement
Fig. 12-18 Flow of Data Transfer by Macro Service (Type A)
Accepts macro service request
Read contents of macro service mode register
Identify channel type
TYPE A
Read channel pointer contents (m)
Read MSC contents (n)
Buffer address calculation m – n
Identify transfer direction
Memory→SFR
Read contents of buffer and transfer read data
to specified SFR
MSC = n – 1
MSC = 0?
Yes
Vectored interrupt request occurs.
End
Other factors
To other macro service processing
SFR→memory
Read specified SFR contents and transfer read
data to buffer
No
Reset interrupt request flag
Chapter 12 Interrupt Functions
End
12
325
Advertisement
Table of Contents
