Format Of 8-Bit Timer Mode Control Register 01 - NEC switch User Manual

(2) 8-bit timer mode control register 01 (TMC01)
TMC01 determines whether to enable or disable 8-bit timer counter 01 (TM01), specifies the count clock for the
8-bit timer/event counter, and controls the operation of the output controller.
TMC01 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets TMC01 to 00H.
Figure 6-4. Format of 8-Bit Timer Mode Control Register 01
Symbol <7> 6 5
TMC01 TCE01 0 0
TCE01
0
Operation disabled (TM01 is cleared to 0.)
1
Operation enabled
TCL011 TCL010
0 0 f /2
X
0 1 f /2
X
1 0 Rising edge of TI01
1 1 Falling edge of TI01
TOE01
0 Output disabled (port mode)
1 Output enabled
Note When inputting a clock signal externally, timer output cannot be used.
Caution Be sure to set the count clock after the timer operation is stopped (TCE01 = 0).
Refer to 6.4 Operation of 8-Bit Timer/Event Counters 00 and 01 for details.
Remarks 1. f : System clock oscillation frequency
X
2. The parenthesized values apply to operation at f
CHAPTER 6 8-BIT TIMER/EVENT COUNTERS 00 AND 01
4 3 2 1
0 0 TCL011TCL010
8-bit timer counter 01 operation control
8-bit timer/event counter 01 count clock selection
4
(375 kHz)
8
(23.4 kHz)
Note
Note
8-bit timer/event counter 01 output control
User's Manual U12978EJ3V0UD
<0> Address After reset
TOE01 FF57H 00H
= 6.0 MHz.
X
R/W
R/W
83