Section 3 MCU Operating Modes
Rev. 1.00 Mar. 12, 2008 Page 66 of 1178
REJ09B0403-0100
3.3
Operating Mode Descriptions
3.3.1 Mode
2
The CPU can access a 16 Mbytes address space in advanced mode. The on-chip ROM is enabled.
After a reset, the LSI is set to single-chip mode. To access an external address space, bit EXPE in
MDCR should be set to 1.
•
Normal extended mode
In extended mode, ports 1, 2 (P23 to P20), and 4 (P47 to P44) function as input ports after a
reset.
Ports 1 and 2 function as an address bus by setting 1 to the corresponding port data direction
register (DDR). Port 3 functions as a data bus port, and parts of port 9 and port C carry bus
control signals. Ports 4 (P43 to P40) and 6 (P63 to P60) function as a data bus port when the
ABW bit in WSCR is cleared to 0.
•
Multiplex extended mode
When 8-bit bus is specified, port 1 functions as the port for address output and data
input/output regardless of the setting of the data direction register (DDR). Ports 2 (P23 to P20)
and 4 (P47 to P44) can be used as a general port.
When 16-bit bus is specified, ports 1, 2 (P23 to P20), and 4 (P47 to P44) function as the port
for address output and data input/output regardless of the setting of the data direction register
(DDR).
Summary of Contents for H8S Family
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Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
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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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