Section 3
MCU Operating Modes
Rev. 1.00 Mar. 12, 2008 Page 63 of 1178
REJ09B0403-0100
3.2.2
System Control Register (SYSCR)
SYSCR selects a system pin function, monitors a reset source, selects the interrupt control mode
and the detection edge for NMI, enables or disables register access to the on-chip peripheral
modules, and enables or disables on-chip RAM address space.
Bit Bit
Name
Initial
Value
R/W Description
7
CS256E
0
R/W
Chip Select 256 Enable
Enables or disables P97/
WAIT
/
CS256
pin function in
extended mode.
0: P97/
WAIT
pin
WAIT
pin function is selected by the settings of
WSCR and WSCR2.
1:
CS256
pin
Outputs low when a 256-kbyte expansion area of
addresses H'F80000 to H'FBFFFF is accessed.
6 IOSE 0 R/W
IOS
Enable
Enables or disables
AS
/
IOS
pin function in extended
mode.
0:
AS
pin
Outputs low when an external area is accessed.
1:
IOS
pin
Outputs low when an IOS expansion area of
addresses H'FFF000 to H'FFF7FF is accessed.
5
4
INTM1
INTM0
0
0
R
R/W
These bits select the control mode of the interrupt
controller. For details on the interrupt control modes, see
section 5.6, Interrupt Control Modes and Interrupt
Operation.
00: Interrupt control mode 0
01: Interrupt control mode 1
10: Setting prohibited
11: Setting prohibited
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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