h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 418
h8s-2111b
Manufacturer Part Number
h8s-2111b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2111B.pdf
(582 pages)
- Current page: 418 of 582
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• STR3 (TWRE = 1 or SELSTR3 = 0)
Rev. 1.00, 05/04, page 384 of 544
Bit
7
6
5
4
Bit Name
IBF3B
OBF3B
MWMF
SWMF
Initial
Value Slave Host Description
0
0
0
0
R
R/(W)* R
R
R/(W)* R
R/W
R
R
Bidirectional Data Register Input Buffer Full
Set to 1 when the host processor writes to TWR15. This
is an internal interrupt source to the slave processor (this
LSI). IBF3B is cleared to 0 when the slave processor
reads TWR15.
0: [Clearing condition]
1: [Setting condition]
Bidirectional Data Register Output Buffer Full
Set to 1 when the slave processor (this LSI) writes to
TWR15. OBF3B is cleared to 0 when the host processor
reads TWR15.
0: [Clearing condition]
1: [Setting condition]
Master Write Mode Flag
Set to 1 when the host processor writes to TWR0.
MWMF is cleared to 0 when the slave processor (this
LSI) reads TWR15.
0: [Clearing condition]
1: [Setting condition]
Slave Write Mode Flag
Set to 1 when the slave processor (this LSI) writes to
TWR0. In the event of simultaneous writes by the master
and the slave, the master write has priority. SWMF is
cleared to 0 when the host reads TWR15
0: [Clearing condition]
1: [Setting condition]
When the slave processor reads TWR15
When the host processor writes to TWR15 using I/O
write cycle
When the host processor reads TWR15 using I/O
read cycle, or the slave processor writes 0 to the
OBF3B bit
When the slave processor writes to TWR15
When the slave processor reads TWR15
When the host processor writes to TWR0 using I/O
write cycle while SWMF = 0
When the host processor reads TWR15 using I/O
read cycle, or the slave processor writes 0 to the
SWMF bit
When the slave processor writes to TWR0 while
MWMF = 0
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