Section 6 Bus Controller
Rev. 3.00 Jan 25, 2006 page 105 of 872
REJ09B0286-0300
6.2
Input/Output Pins
Table 6.1 summarizes the pins of the bus controller.
Table 6.1
Pin Configuration
Symbol
I/O
Function
AS
Output
Strobe signal indicating that address output on the address
bus is enabled (when the IOSE bit in SYSCR is cleared to 0).
Note that this signal is not output (the 256-kbyte expansion
area is accessed while the CS256E bit in SYSCR is 1) or
when the CP/CF expansion area is accessed (the CPCSE bit
in BCR2 is 1).
IOS
Output
I/O select signal (when the IOSE bit in SYSCR is set to 1).
CPCS1
,
CPCS2
Output
Chip select signal indicating that the CP/CF expansion area is
being accessed (in mode 2 or when the CPCSE bit in BCR2
is set to 1).
CS256
Output
Chip select signal indicating that the 256-kbyte expansion
area is being accessed (in mode 2 or when the CS256E bit in
SYSCR is set to 1).
RD
/
CPOE
Output
Strobe signal indicating that the external address space is
being read.
HWR
/
CPWE
Output
Strobe signal indicating that the external address space is
being written to, and the upper half (D15 to D8) of the data
bus is enabled.
(Note however that the effective data bus must be specified
by the
CPCS1
and
CPCS2
signals when the CP/CF
expansion area is being accessed.)
LWR
Output
Strobe signal indicating that the external address space is
being written to, and the lower half (D7 to D0) of the data bus
is enabled.
WAIT
/
CPWAIT
Input
Wait request signal when accessing the external 3-state
access space or CP/CF expansion area.
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...