Section 6 Bus Controller
Rev. 3.00 Jan 25, 2006 page 108 of 872
REJ09B0286-0300
6.3.2
Bus Control Register 2 (BCR2)
BCR2 is used to specify the access mode for the CP expansion area (basic mode) and CF
expansion area (memory card mode).
Bit
Bit Name
Initial Value
R/W
Description
7
OWEAC
0
R/W
OE/WE Assert Control
Specifies the number of cycles from address output to
the
CPOE
and
CPWE
signal assertion when the CF
expansion area is specified as the CP expansion area.
0: 0.5 cycles
1: 1.5 cycles
If the ASTCP bit is cleared to 0, this bit must not be set
to 1.
6
OWENC
0
R/W
OE/WE Negate Control
Specifies the number of delay cycles from
CPOE
and
CPWE
signal negation to address hold when the CF
expansion area is specified as the CP expansion area.
0: 0.5 cycles
1: 1.5 cycles
If the ASTCP bit is cleared to 0, this bit must not be set
to 1.
5
ABWCP
1
R/W
CP Expansion Area Bus Width Control
Selects the bus width for access to the CP expansion
area when the CPCSE bit in BCR2 is set to 1 while the
CFE bit in BCR is cleared to 0. When the CPCSE bit in
BCR2 is set to 1 while the CFE bit in BCR is set to 1,
the bus width for access to the CF expansion area is
fixed at 16 bits.
0: 16-bit bus
1: 8-bit bus
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...