Section 6 Bus Controller (BSC)
Rev. 1.00 Mar. 12, 2008 Page 108 of 1178
REJ09B0403-0100
6.2 Input/Output
Pins
Table 6.1 summarizes the pin configuration 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 when the 256-Kbyte
extended area is accessed (the CS256E bit in SYSCR is 1).
IOS
Output
Chip select signal indicating that the IOS extended area is
being accessed (when the IOSE bit in SYSCR is 1).
CS256
Output
Chip select signal indicating that the 256-Kbyte extended
area is being accessed (when the CS256E bit in SYSCR is
1).
RD
Output
Strobe signal indicating that the external address space is
being read.
HWR
Output
Strobe signal indicating that the external address space is
being written to, and the upper half (D15 to D8, AD15 to
AD8) of the data bus is valid.
LWR
Output
Strobe signal indicating that the external address space is
being written to, and the lower half (D7 to D0, AD7 to AD0) of
the data bus is valid.
WAIT
Input
Wait request signal when accessing the external space.
WR
Output
Strobe signal indicating that the external address space is
being written to.
HBE
Output
Strobe signal indicating that the external address space is
being accessed, and the upper half (D15 to D8) of the data
bus is valid.
LBE
Output
Strobe signal indicating that the external address space is
being accessed, and the lower half (D7 to D0) of the data
bus is valid.
AH
Output
Signal indicating address fetch timing when the bus is in
address-data multiplex bus state.
AD15 to AD0
Input/Output
Address output and data input/output pins for address-data
multiplex extension.
Summary of Contents for H8S Family
Page 2: ...Rev 1 00 Mar 12 2008 Page ii of xIviii...
Page 8: ...Rev 1 00 Mar 12 2008 Page viii of xIviii...
Page 28: ...Rev 1 00 Mar 12 2008 Page xxviii of xIviii...
Page 48: ...Rev 1 00 Mar 12 2008 Page xlviii of xIviii...
Page 70: ...Section 1 Overview Rev 1 00 Mar 12 2008 Page 22 of 1178 REJ09B0403 0100...
Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
Page 116: ...Section 3 MCU Operating Modes Rev 1 00 Mar 12 2008 Page 68 of 1178 REJ09B0403 0100...
Page 152: ...Section 5 Interrupt Controller Rev 1 00 Mar 12 2008 Page 104 of 1178 REJ09B0403 0100...
Page 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Page 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Page 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Page 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Page 712: ...Section 18 I2 C Bus Interface IIC Rev 1 00 Mar 12 2008 Page 664 of 1178 REJ09B0403 0100...
Page 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Page 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Page 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Page 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Page 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
Page 1226: ...Rev 1 00 Mar 12 2008 Page 1178 of 1178 REJ09B0403 0100...
Page 1229: ......
Page 1230: ...H8S 2472 Group H8S 2462 Group Hardware Manual...