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Section 9 Timers
Rev. 6.00 Sep 12, 2006 page 222 of 526
REJ09B0326-0600
Bit 5
Timer Overflow Flag (OVF):
Bit 5 is a status flag indicating that TCNTV has overflowed
from H'FF to H'00. This flag is set by hardware and cleared by software. It cannot be set by
software.
Bit 5: OVF
Description
0 Clearing
condition:
After reading OVF = 1, cleared by writing 0 to OVF
(initial value)
1 Setting
condition:
Set when TCNTV overflows from H'FF to H'00
Bit 4
Reserved Bit:
Bit 4 is reserved; it is always read as 1, and cannot be modified.
Bits 3 to 0
Output Select 3 to 0 (OS3 to OS0):
Bits 3 to 0 select the way in which the output
level at the TMOV pin changes in response to compare match between TCNTV and TCORA or
TCORB.
OS3 and OS2 select the output level for compare match B. OS1 and OS0 select the output level
for compare match A. The two levels can be controlled independently.
If two compare matches occur simultaneously, any conflict between the settings is resolved
according to the following priority order: toggle output > 1 output > 0 output.
When OS3 to OS0 are all cleared to 0, timer output is disabled.
After a reset, the timer output is 0 until the first compare match.
Bit 3: OS3
Bit 2: OS2
Description
0
0
No change at compare match B
(initial value)
1
0 output at compare match B
1
0
1 output at compare match B
1
Output toggles at compare match B
Bit 1: OS1
Bit 0: OS0
Description
0
0
No change at compare match A
(initial value)
1
0 output at compare match A
1
0
1 output at compare match A
1
Output toggles at compare match A
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...