HD6432646 Hitachi, HD6432646 Datasheet - Page 574

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

15.2.4
The mailbox configuration register (MBCR) is a 16-bit readable/writable register that is used to set
mailbox (buffer) transmission/reception.
Bits 15 to 9 and 7 to 0—Mailbox Setting Register: These bits set the polarity of the
corresponding mailboxes.
Bit x: MBCRx
0
1
Bit 8—Reserved: This bit always reads 1. The write value should always be 1.
540
Initial value:
Initial value:
MBCR
Mailbox Configuration Register (MBCR)
R/W:
R/W:
Bit:
Bit:
MBCR15 MBCR14 MBCR13 MBCR12 MBCR11 MBCR10
MBCR7
Description
Corresponding mailbox is set for transmission
Corresponding mailbox is set for reception
R/W
R/W
15
0
7
0
MBCR6
R/W
R/W
14
0
6
0
MBCR5
R/W
R/W
13
0
5
0
MBCR4
R/W
R/W
12
0
4
0
MBCR3
R/W
R/W
11
0
3
0
MBCR2
R/W
R/W
10
0
2
0
MBCR1
MBCR9
R/W
R/W
9
0
1
0
(Initial value)
(x = 15 to 0)
MBCR8
R/W
—
—
8
1
0
0