upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 205

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

8.3
(1) Timer clock selection register 5n (TCL5n)
The following four registers are used to control 8-bit timer/event counters 50 and 51.
• Timer clock selection register 5n (TCL5n)
• 8-bit timer mode control register 5n (TMC5n)
• Port mode register 1 (PM1) or port mode register 3 (PM3)
• Port register 1 (P1) or port register 3 (P3)
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
This register sets the count clock of 8-bit timer/event counter 5n and the valid edge of TI5n input.
TCL5n can be set by an 8-bit memory manipulation instruction.
RESET input clears TCL5n to 00H.
Remark n = 0, 1
Address: FF6AH
Symbol
TCL50
Registers Controlling 8-Bit Timer/Event Counters 50 and 51
• V
• V
• V
• V
DD
DD
DD
DD
2. Figures in parentheses apply to operation at f
2. When rewriting TCL50 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 50 is not
guaranteed.
: X1 input clock oscillation frequency
TCL502
7
0
0
0
0
0
1
1
1
1
After reset: 00H
Figure 8-5. Format of Timer Clock Selection Register 50 (TCL50)
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 50 AND 51
TCL501
6
0
0
0
1
1
0
0
1
1
R/W
TCL500
User’s Manual U15947EJ3V1UD
5
0
0
1
0
1
0
1
0
1
TI50 falling edge
TI50 rising edge
f
f
f
f
f
f
X
X
X
X
X
X
/2 (5 MHz)
/2
/2
/2
/2
(10 MHz)
2
6
8
13
(2.5 MHz)
(156.25 kHz)
(39.06 kHz)
4
0
(1.22 kHz)
X
= 10 MHz.
3
0
Count clock selection
TCL502
2
Note
TCL501
1
TCL500
0
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