upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 168

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

168
Note Set the count clock to satisfy the following conditions.
Cautions 1. When the Ring-OSC clock is selected as the clock to be supplied to the CPU, the clock of the
Remarks 1. f
Address: FF8CH
Symbol
TCL51
• V
• V
• V
• V
2. Figures in parentheses apply to operation at f
DD
DD
DD
DD
2. When rewriting TCL51 to other data, stop the timer operation beforehand.
3. Be sure to clear bits 3 to 7 to 0.
= 4.0 to 5.5 V: Count clock or base clock ≤ 10 MHz
= 3.3 to 4.0 V: Count clock or base clock ≤ 8.38 MHz
= 2.7 to 3.3 V: Count clock or base clock ≤ 5 MHz
= 2.5 to 2.7 V: Count clock or base clock ≤ 2.5 MHz
X
Ring-OSC oscillator is divided and supplied as the count clock. If the count clock is the
Ring-OSC clock, the operation of 8-bit timer/event counter 51 is not guaranteed.
: X1 input clock oscillation frequency
TCL512
7
0
0
0
0
0
1
1
1
1
After reset: 00H
Figure 7-6. Format of Timer Clock Selection Register 51 (TCL51)
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
TCL511
6
0
0
0
1
1
0
0
1
1
R/W
TCL510
User’s Manual U16227EJ3V0UD
5
0
0
1
0
1
0
1
0
1
TI51 falling edge
TI51 rising edge
f
f
f
f
f
f
X
X
X
X
X
X
/2 (5 MHz)
/2
/2
/2
/2
(10 MHz)
4
6
8
12
(625 kHz)
(156.25 kHz)
(39.06 kHz)
4
0
(2.44 kHz)
X
= 10 MHz.
3
0
Count clock selection
TCL512
2
Note
TCL511
1
TCL510
0