Section 6 User Break Controller (UBC)
Rev. 2.00 Mar 09, 2006 page 225 of 906
REJ09B0292-0200
6.2.17
Break Bus Cycle Register D (BBRD)
Bit:
15
14
13
12
11
10
9
8
—
—
—
—
—
—
XYED
XYSD
Initial value:
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
CPD1
CPD0
IDD1
IDD0
RWD1
RWD0
SZD1
SZD0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Break bus cycle register D (BBRD) is a 16-bit readable/writable register that sets five channel D
break conditions: (1) internal bus (C-bus, I-bus)/X memory bus/Y memory bus), (2) CPU
cycle/on-chip DMAC (DMAC, E-DMAC) cycle, (3) instruction fetch/data access, (4) read/write,
and (5) operand size. BBRD is initialized to H'0000 by a power-on reset; after a manual reset, its
value is undefined.
Bits 15 to 10—Reserved: These bits are always read as 0. The write value should always be 0.
Bit 9—X/Y Memory Bus Enable D (XYED): Selects whether the X/Y bus is used as a channel D
break condition.
Bit 9: XYED
Description
0
Cache bus or internal bus is selected as condition for channel D address/data
(Initial value)
1
X/Y bus is selected as condition for channel D address/data
Bit 8—X Bus/Y Bus Select D (XYSD): Selects whether the X bus or the Y bus is used as a
channel D break condition. This bit is valid only when bit XYED = 1.
Bit 8: XYSD
Description
0
X bus is selected as channel D break condition
(Initial value)
1
Y bus is selected as channel D break condition
The configuration of bits 7 to 0 is the same as for BBRA.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...