HD6432646 Hitachi, HD6432646 Datasheet - Page 17
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Section
B.2 Functions
C.12 Port F Block
Diagrams
Page
890
1009
1107
PFDR—Port F Data Register H'FF0E
Bit
Initial value
Read/Write
Description
UMSR—Unread Message Status Register
Note added
Note: * Only 1 can be written, to clear the flag.
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
UMSR15
UMSR7
R/(W)*
R/(W)*
R/W
—
7
0
15
7
0
0
Unread Message Status Flags
0
1
[Clearing condition]
Writing 1
Unread receive message is overwritten by a new message
[Setting condition]
When a new message is received before RXPR is cleared
UMSR14
PF6DR
UMSR6
R/(W)*
R/(W)*
R/W
6
0
14
6
0
0
UMSR13
PF5DR
UMSR5
R/(W)*
Mode 4/5/6
R/(W)*
R/W
13
5
0
5
0
0
UMSR12
Q
PF4DR
PF7DDR
UMSR4
R/(W)*
R/(W)*
WDDRF
S
R/W
Port
12
4
0
4
0
0
*
C
Reset
R
D
UMSR11
D
UMSR3
PF3DR
R/(W)*
R/(W)*
R/W
11
3
0
3
0
0
H'F81A
UMSR10
UMSR2
PF2DR
R/(W)*
R/(W)*
R/W
10
2
0
2
0
0
HCAN
(x = 15 to 0)
Undefined
UMSR9
UMSR1
R/(W)*
R/(W)*
—
—
1
0
9
0
1
UMSR8
UMSR0
R/(W)*
R/(W)*
PF0DR
R/W
8
0
0
0
0
0
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