HD6432646 Hitachi, HD6432646 Datasheet - Page 577

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

15.2.7
The transmit acknowledge register (TXACK) is a 16-bit readable/writable register containing
status flags that indicate normal transmission of mailbox (buffer) transmit messages.
Note: * Only a write of 1 is permitted, to clear the flag.
Bits 15 to 9 and 7 to 0—Transmit Acknowledge Register: These bits indicate that a transmit
message in the corresponding HCAN mailbox has been transmitted normally.
Bit x: TXACKx
0
1
Bit 8—Reserved: This bit always reads 0. The write value should always be 0.
Initial value:
Initial value:
TXACK
Transmit Acknowledge Register (TXACK)
R/W:
R/W:
Bit:
Bit:
TXACK15 TXACK14 TXACK13 TXACK12 TXACK11 TXACK10 TXACK9 TXACK8
TXACK7
R/(W)*
R/(W)*
Description
[Clearing condition]
Writing 1
Completion of message transmission for corresponding mailbox
15
0
7
0
TXACK6 TXACK5
R/(W)*
R/(W)*
14
0
6
0
R/(W)*
R/(W)*
13
0
5
0
TXACK4 TXACK3
R/(W)*
R/(W)*
12
0
4
0
R/(W)*
R/(W)*
11
0
3
0
TXACK2
R/(W)*
R/(W)*
10
0
2
0
TXACK1
R/(W)*
R/(W)*
9
0
1
0
(Initial value)
(x = 15 to 0)
R/(W)*
—
—
8
0
0
0
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