Register Controlling 8-Bit Timer 80 - NEC 78K0S/KB1+ User Manual

7.3

Register Controlling 8-bit Timer 80

8-bit timer 80 is controlled by 8-bit timer mode control register 80 (TMC80).
(1) 8-bit timer mode control register 80 (TMC80)
This register is used to enable or stop the operation of 8-bit timer/counter 80 (TM80), and to set the count
clock of TM80.
This register is set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears TMC80 to 00H.
Figure 7-4. Format of 8-bit Timer Mode Control Register 80 (TMC80)
Address: FFCCH After reset: 00H
Symbol <7>
TMC80 TCE80
TCE80
0 Stop operation (clear TM80 to 00H).
1 Enable operation.
TCL801 TCL800
0
0
1
1
Cautions 1. Be sure to set TMC80 after stopping the timer operation.
2. Be sure to clear bits 0 and 6 to 0.
Remark f : Oscillation frequency of clock to peripheral hardware
XP
CHAPTER 7 8-BIT TIMER 80
R/W
6 5
0 0
6
0 f /2 125 kHz
XP
8
1 f /2 31.25 kHz
XP
10
0 f /2 7.81 kHz
XP
16
1 f /2 0.12 kHz
XP
User's Manual U17446EJ3V1UD
4 3
0 0 TCL801
Control of operation of TM80
Selection of count clock of 8-bit timer 80
f = 8.0 MHz
XP
2 1
TCL800
f = 10.0 MHz
XP
156.3 kHz
39.06 kHz
9.77 kHz
0.15 kHz
0
0
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