Section 3 MCU Operating Modes
Rev. 1.00 Mar. 12, 2008 Page 64 of 1178
REJ09B0403-0100
Bit Bit
Name
Initial
Value
R/W Description
3 XRST 1 R External
Reset
This bit indicates the reset source. A reset is caused by an
external reset input, or when the watchdog timer
overflows.
0: A reset is caused when the watchdog timer
overflows.
1: A reset is caused by an external reset.
2
NMIEG
0
R/W
NMI Edge Select
Selects the valid edge of the NMI interrupt input.
0: An interrupt is requested at the falling edge of NMI
input
1: An interrupt is requested at the rising edge of NMI
input
1 —
0 R/W
Reserved
The initial value should not be changed.
0 RAME 1 R/W
RAM
Enable
Enables or disables on-chip RAM. The RAME bit is
initialized when the reset state is released.
0: On-chip RAM is disabled
1: On-chip RAM is enabled
3.2.3
Serial Timer Control Register (STCR)
STCR enables or disables register access, IIC operating mode, and on-chip flash memory, and
selects the input clock of the timer counter.
Bit Bit
Name
Initial
Value
R/W Description
7
6
5
IICX2
IICX1
IICX0
0
0
0
R/W
R/W
R/W
IIC Transfer Rate Select 2, 1, and 0
These bits control the IIC operation. These bits select a
transfer rate in master mode together with bits CKS2 to
CKS0 in the I
2
C bus mode register (ICMR). For details on
the transfer rate, see table 18.3.
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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