UPD784938 Datasheet, PDF (376/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 12 TIMER 3
12.3 Timer 3 Control Registers
(1) Timer control register 0 (TMC0)
TMC0 controls the timer 3 timer counter 3 (TM3/TM3W) count operation by the high-order 4 bits (the low-order 4 bits
control the count operation of timer/event counter 0 TM0).
TMC0 can be read or written to with an 8-bit manipulation instruction. The format of TMC0 is shown in
Figure 12-2.
RESET input clears TMC0 to 00H.
7
6
TMC0 CE3 0
Figure 12-2. Timer Control Register 0 (TMC0) Format
5
4
3
2
1
0
Address After reset R/W
0 BW3 CE0 OVF0 0
0
0FF5DH
00H
R/W
Countrols count operation of timer/event counter 0
TM0 (see Figure 9-2).
BW3
Timer 3 Bit Length Specification
0 8-bit operating mode
1 16-bit operating mode
CE3 TM3/TM3W Count Operation Control
0 Count operation stopped with count
cleared
1 Count operation enabled
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Preliminary User’s Manual U13987EJ1V0UM00