HD64F2168 Datasheet, PDF (602/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

R/W
Bit Bit Name Initial Value Slave Host Description
1 CLR_RD_ 0
PTR
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]
0 CLR_WR_ 0
PTR
When the host writes a 1.
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.
Rev. 3.00, 03/04, page 562 of 830