NEC 78K0 Series User Manual page 251

Figure 8-8. Format of 8-Bit Timer Mode Control Register 51 (TMC51)
Address: FF43H After reset: 00H
Symbol <7>
TMC51 TCE51
TCE51
0 After clearing to 0, count operation disabled (counter stopped)
1 Count operation start
TMC516
0 Mode in which clear & start occurs on a match between TM51 and CR51
1 PWM (free-running) mode
LVS51
0
0
1
1
TMC511
0 Inversion operation disabled
1 Inversion operation enabled
TOE51
0 Output disabled (TM51 output is low level)
1 Output enabled
Note Bits 2 and 3 are write-only.
Cautions 1. The settings of LVS5n and LVR5n are valid in other than PWM mode.
2. Perform <1> to <4> below in the following order, not at the same time.
<1> Set TMC5n1, TMC5n6:
<2> Set TOE5n to enable output:
<3> Set LVS5n, LVR5n (see Caution 1): Timer F/F setting
<4> Set TCE5n
3. Stop operation before rewriting TMC5n6.
Remarks 1. In PWM mode, PWM output is made inactive by clearing TCE5n to 0.
2. If LVS5n and LVR5n are read, the value is 0.
3. The values of the TMC5n6, LVS5n, LVR5n, TMC5n1, and TOE5n bits are reflected at the TO5n pin
regardless of the value of TCE5n.
4. n = 0, 1
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 50 AND 51
Note
R/W
6 5
TMC516 0
TM51 operating mode selection
LVR51
0 No change
1 Timer output F/F clear (0) (default output value of TO51 pin: low)
0 Timer output F/F set (1) (default output value of TO51 pin: high)
1 Setting prohibited
In other modes (TMC516 = 0)
Timer F/F control
Preliminary User's Manual U17260EJ3V1UD
4 <3> <2>
0 LVS51 LVR51
TM51 count operation control
Timer output F/F status setting
In PWM mode (TMC516 = 1)
Active level selection
Active-high
Active-low
Timer output control
Operation mode setting
Timer output enable
1 <0>
TMC511 TOE51
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