HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 235

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

6.2.13
BARDH
BARDL
Break address register D (BARD) consists of two 16-bit readable/writable registers: break address
register DH (BARDH) and break address register DL (BARDL). BARDH specifies the upper half
(bits 31 to 16) of the address used as a channel D break condition, and BARDL specifies the lower
half (bits 15 to 0). The address bus connected to the X/Y memory can also be specified as a break
condition by making a setting in the XYED bit/XYSD bit in break bus cycle register D (BBRD).
When XYED = 0, BAD31 to BAD0 specify the address. When XYED = 1, the upper 16 bits
(BAD31 to BAD16) of BARD specify the X address bus, and the lower 16 bits (BAD15 to BAD0)
specify the Y address bus. BARDH and BARDL are initialized to H'0000 by a power-on reset;
after a manual reset, their values are undefined.
Initial value
Read/Write
Initial value
Read/Write
Initial value
Read/Write
Initial value
Read/Write
Break Address Register D (BARD)
Bit
Bit
Bit
Bit
BAD31
BAD23
BAD15
BAD7
R/W
R/W
R/W
R/W
15
15
0
7
0
0
7
0
BAD30
BAD22
BAD14
BAD6
R/W
R/W
R/W
R/W
14
14
0
6
0
0
6
0
BAD29
BAD21
BAD13
BAD5
R/W
R/W
R/W
R/W
13
13
0
5
0
0
5
0
BAD28
BAD20
BAD12
BAD4
R/W
R/W
R/W
R/W
12
12
0
4
0
0
4
0
BAD27
BAD19
BAD11
BAD3
R/W
R/W
R/W
R/W
11
11
0
3
0
0
3
0
BAD26
BAD18
BAD10
BAD2
R/W
R/W
R/W
R/W
10
10
0
2
0
0
2
0
BAD25
BAD17
BAD9
BAD1
R/W
R/W
R/W
R/W
9
0
1
0
9
0
1
0
BAD24
BAD16
BAD8
BAD0
R/W
R/W
R/W
R/W
8
0
0
0
8
0
0
0
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