Section 6
Bus Controller (BSC)
Rev. 1.00 Mar. 12, 2008 Page 123 of 1178
REJ09B0403-0100
Table 6.10 Bus Specifications for 256-Kbyte Extended Area/Multiplex Bus Interface
(Address Cycle)
AST256 WMS10 WC22 WC11
WC10
Number of
Access
States
Number of
Program
Wait States
0
0
1
2
1
Table 6.11 Bus Specifications for 256-Kbyte Extended Area/Multiplex Bus Interface
(Data Cycle)
AST256 WMS1 WC1
WC0
Number of
Access States
Number of
Program Wait
States
0 — — — 2 0
1 — — 3 0
0 3 0
0
1 1
0 2
1
0
1
1 3
6.4.2 Advanced
Mode
The external address space (H'FFF000 to H'FFF7FF) can be accessed by specifying the
AS
/
IOS
pin as an I/O strobe pin. The 256-Kbyte extended area (H'F80000 to H'FBFFFF) can be accessed
by the
CS256
pin function.
The external address space is initialized as the basic bus interface and a 3-state access space. In
mode 2, the address space other than on-chip ROM, on-chip RAM, internal I/O registers, and their
reserved areas is specified as the external address space. The on-chip RAM and its reserved area
are enabled when the RAME bit in SYSCR is set to 1, and disabled when the RAME bit is cleared
to 0. Addresses H'FF0800 to H'FFBFFF, H'FFE080 to H'FFEFFF, and H'FFFF00 to H'FFFF7F in
the on-chip RAM area and its reserved area are always specified as the external address space.
Summary of Contents for H8S Family
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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...
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