Section 10 16-Bit Free-Running Timer (FRT)
Rev. 1.00 Mar. 12, 2008 Page 378 of 1178
REJ09B0403-0100
10.2.5 Timer
Control/Status Register (TCSR)
TCSR is used for counter clear selection and control of interrupt request signals.
Bit Bit
Name
Initial
Value
R/W Description
7 to 4
All
0
R
Reserved
These bits are always read as 0 and cannot be modified.
3 OCFA 0 R/(W)
*
Output Compare Flag A
Indicates that the FRC value matches the OCRA value.
[Setting condition]
When FRC = OCRA
[Clearing condition]
Read OCFA when OCFA = 1, then write 0 to OCFA
2 OCFB 0 R/(W)
*
Output Compare Flag B
Indicates that the FRC value matches the OCRB value.
[Setting condition]
When FRC = OCRB
[Clearing condition]
Read OCFB when OCFB = 1, then write 0 to OCFB
1 OVF 0 R/(W)
*
Overflow
Flag
Indicates that the FRC has overflowed.
[Setting condition]
When FRC overflows (changes from H'FFFF to H'0000)
[Clearing condition]
Read OVF when OVF = 1, then write 0 to OVF
0
CCLRA
0
R/W
Counter Clear A
Selects whether the FRC is to be cleared on compare-
match A (when the FRC and OCRA values match).
0: FRC clearing is disabled
1: FRC is cleared on compare-match A
Note:
*
Only 0 can be written to clear the flag.
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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Page 1230: ...H8S 2472 Group H8S 2462 Group Hardware Manual...