Renesas H8S Family, Hardware Manual

Page: 777 / 1230

Section 19 LPC Interface (LPC)
Rev. 1.00 Mar. 12, 2008 Page 729 of 1178
REJ09B0403-0100
R/W
Bit Bit Name
Initial
Value Slave Host
Description
1 CLR_RD_
PTR
0 R/(W)
*
2
(W)
*
1
Read Pointer Clear
This bit is used by the host to clear the read pointer
during read transfer. A host read operation always
yields 0 on readout.
0: Read pointer clear wait
[Clearing condition]
When the slave writes a 0 after a 1 has been read
from CLR_RD_PTR.
1: Read pointer clear
[Setting condition]
When the host writes a 1.
0 CLR_WR_
PTR
0 R/(W) *
2
(W) *
1
Write Pointer Clear
This bit is used by the host to clear the write pointer
during write transfer. A host read operation always
yields 0 on readout.
0: Write pointer clear wait
[Clearing condition]
When the slave writes a 0 after a 1 has been read
from CLR_WR_PTR.
1: Write pointer clear
[Setting condition]
When the host writes a 1.
Notes: 1. Only 1 can be written to set this flag.
2. Only 0 can be written to clear this flag.
3. Only 1 can be written to toggle this flag.
4. Only 0 can be written to set this flag.
5. Only 1 can be written to clear this flag.