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CHAPTER 3 INTERRUPT
■
Buffer address pointer (BAP)
Buffer address pointer (BAP) is 24-bit register. EI
data transferring source. Buffer address pointer exists in each channel. So, the data can be
transferring between the 16M-byte memory address and the peripheral function (resource)
address. If the BAP updated/fixed setting bit (BF) is set to "0", the lower 16-bit (BAPM, BAPL) is
incremented, and the higher 8-bit (BAPH) is not incremented.
BAP
R/W: Readable/Writable
X
: Undefined
References:
•
The maximum transfer count that can be set by the data counter (DCT) is 65,536 (64K
bytes).
•
The area that can be set by the I/O address pointer (IOA) is 000000
•
The area that can be set by the buffer address pointer (BAP) is 000000
84
Figure 3.7-6 Configuration of Buffer Address Pointer (BAP)
to
bit23
bit16
bit15
BAPH
(R/W)
2
OS operation set the memory address of the
to
to
bit8 bit7
BAPL
BAPM
(R/W)
(R/W)
Initial value
bit0
XXXXXX
H
to 00FFFF
.
H
H
to FFFFFF
.
H
H
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