NEC 78K0 Series User Manual page 178

Figure 7-7. Format of 16-Bit Timer Mode Control Register 01 (TMC01)
Address: FFB6H After reset: 00H
Symbol 7
TMC01 0
TMC013
0
0
1
1
TMC011
0
1
OVF01
Clear (0)
Set (1)
OVF01 is set to 1 when the value of TM01 changes from FFFFH to 0000H in all the operation modes (free-running
timer mode, clear & start mode entered by TI001 pin valid edge input, and clear & start mode entered upon a match
between TM01 and CR001).
It can also be set to 1 by writing 1 to OVF01.
Note The TI001 pin valid edge is set by bits 5 and 4 (ES011, ES010) of prescaler mode register 01 (PRM01).
178
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
R/W
6 5
0 0
TMC012
0 Disables TM01 operation. Stops supplying operating clock. Asynchronously resets
the internal circuit.
1 Free-running timer mode
0 Clear & start mode entered by TI001 pin valid edge input
1 Clear & start mode entered upon a match between TM01 and CR001
• Match between TM01 and CR001 or match between TM01 and CR011
• Match between TM01 and CR001 or match between TM01 and CR011
• Trigger input of TI001 pin valid edge
Clears OVF01 to 0 or TMC013 and TMC012 = 00
Overflow occurs.
Preliminary User's Manual U17260EJ3V1UD
4 3
0 TMC013
Operation enable of 16-bit timer/event counter 01
Condition to reverse timer output (TO01)
TM01 overflow flag
2 1
TMC012 TMC011
Note
<0>
OVF01