UPD780138 Datasheet, PDF (193/558 Pages) NEC – 8-Bit Single-Chip Microcontrollers

CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
(2) 8-bit timer mode control register 5n (TMC5n)
TMC5n is a register that performs the following five types of settings.
<1> 8-bit timer counter 5n (TM5n) count operation control
<2> 8-bit timer counter 5n (TM5n) operating mode selection
<3> Timer output F/F (flip flop) status setting
<4> Active level selection in timer F/F control or PWM (free-running) mode.
<5> Timer output control
TMC5n can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Remark n = 0, 1
Figure 7-7. Format of 8-Bit Timer Mode Control Register 50 (TMC50)
Address: FF6BH After reset: 00H R/W^Note
Symbol
<7>
6
5
TMC50
TCE50 TMC506
0
4
<3>
<2>
1
<0>
0
LVS50
LVR50
TMC501
TOE50
TCE50
0
1
TM50 count operation control
After clearing to 0, count operation disabled (counter stopped)
Count operation start
TMC506
0
1
TM50 operating mode selection
Mode in which clear & start occurs on a match between TM50 and CR50
PWM (free-running) mode
LVS50
0
0
1
1
LVR50
0
1
0
1
Timer output F/F status setting
No change
Timer output F/F reset (0)
Timer output F/F set (1)
Setting prohibited
TMC501
0
1
In other modes (TMC506 = 0)
Timer F/F control
Inversion operation disabled
Inversion operation enabled
In PWM mode (TMC506 = 1)
Active level selection
Active-high
Active-low
TOE50
0
1
Timer output control
Output disabled (TM50 output is low level)
Output enabled
Note Bits 2 and 3 are write-only.
(Refer to Cautions and Remarks on the next page.)
User’s Manual U16228EJ2V0UD
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