HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 561
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6432160.pdf
(829 pages)
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Note:* Only 0 can be written to clear the flag.
Bit
7
6
5
4
3
2
1
0
STR1
Bit Name Initial Value Slave Host Description
DBU17
DBU16
DBU15
DBU14
C/'1
DBU12
IBF1
OBF1
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R
R/W
R
R/(W)* R
R/W
R
R
R
R
R
R
R
Defined by User
The user can use these bits as necessary.
Command/Data
When the host processor writes to an IDR register,
bit 2 of the I/O address is written into this bit to
indicate whether IDR contains data or a command.
0: Contents of data register (IDR) are data
1: Contents of data register (IDR) are a command
Defined by User
The user can use this bit as necessary.
Input Buffer Full
Set to 1 when the host processor writes to IDR. This
bit is an internal interrupt source to the slave
processor (this LSI). IBF is cleared to 0 when the
slave processor reads IDR.
The IBF1 flag setting and clearing conditions are
different when the fast A20 gate is used. For details
see table 19.3.
0: [Clearing condition]
When the slave processor reads IDR
1: [Setting condition]
When the host processor writes to IDR using I/O
write cycle
Output Buffer Full
Set to 1 when the slave processor (this LSI) writes to
ODR. Cleared to 0 when the host processor reads
ODR.
0: [Clearing condition]
When the host processor reads ODR using I/O read
cycle, or the slave processor writes 0 to the OBF bit
1: [Setting condition]
When the slave processor writes to ODR
Rev. 2.0, 08/02, page 521 of 788
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