Section 6 Bus Controller (BSC)
Rev.2.00 Jun. 28, 2007 Page 138 of 666
REJ09B0311-0200
Bit Bit
Name
Initial
Value R/W Description
14 BREQOE
0
R/W
BREQO
Pin Enable
Controls outputting the bus request signal (
BREQO
) to
the external bus master in the external bus released state
when an internal bus master performs an external
address space access.
0:
BREQO
output disabled
BREQO
pin can be used as I/O port
1:
BREQO
output enabled
13, 12
All
0
R
Reserved
These are read-only bits and cannot be modified.
11, 10
All 0
R/W
Reserved
These bits are always read as 0. The write value should
always be 0.
9
WDBE
0
R/W
Write Data Buffer Enable
The write data buffer function can be used for an external
write cycle.
Note that a set value change may not be reflected to the
external access immediately after the change.
0: Write data buffer function not used
1: Write data buffer function used
8 WAITE
0 R/W
WAIT
Pin Enable
Selects enabling/disabling of wait input by the
WAIT
pin.
0: Wait input by
WAIT
pin disabled
WAIT
pin can be used as I/O port
1: Wait input by
WAIT
pin enabled
To set this bit to 1, the ICR bit of the corresponding pin
should be specified to 1. For details, see section 8, I/O
ports.
7, 6
All
0
R/W
Reserved
These bits are always read as 0. The write value should
always be 0.
5 to 0
All
0
R
Reserved
These are read-only bits and cannot be modified.
Содержание H8SX/1650
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Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
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