upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 206

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

206
Note Set the count clock to satisfy the following conditions.
Cautions 1. When the internal oscillation clock is selected as the clock to be supplied to the CPU, the
Remarks 1. f
Address: FF8CH
Symbol
TCL51
• V
• V
• V
• V
DD
DD
DD
DD
2. Figures in parentheses apply to operation at f
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 ≤ 10 MHz
= 3.3 to 4.0 V: Count clock ≤ 8.38 MHz
= 2.7 to 3.3 V: Count clock ≤ 5 MHz
= 2.5 to 2.7 V: Count clock ≤ 2.5 MHz
X
clock of the internal oscillator is divided and supplied as the count clock. If the count clock
is the internal oscillation 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 8-6. Format of Timer Clock Selection Register 51 (TCL51)
CHAPTER 8 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 U15947EJ3V1UD
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