upd78f0103hmca1-5a4-a Renesas Electronics Corporation., upd78f0103hmca1-5a4-a Datasheet - Page 144

• Manufacturer Part Number: upd78f0103hmca1-5a4-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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7.3 Registers Controlling 8-Bit Timer/Event Counter 50
(1) Timer clock selection register 50 (TCL50)
144
The following four registers are used to control 8-bit timer/event counter 50.
• Timer four selection register 50 (TCL50)
• 8-bit timer mode control register 50 (TMC50)
• Port mode register 1 (PM1)
• Port register 1 (P1)
Note Be sure to set the count clock so that the following condition is satisfied.
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 50 and the valid edge of the TI50 pin input.
TCL50 can be set by an 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Address: FF6AH
Symbol
TCL50
• V
• V
• V
• V
2. Figures in parentheses apply to operation at f
DD
DD
DD
DD
2. When rewriting TCL50 to other than the same data, stop the timer operation beforehand.
3. Be sure to set 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 (standard products, (A) grade products only)
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.
: High-speed system clock oscillation frequency
TCL502
7
0
0
0
0
0
1
1
1
1
After reset: 00H
Figure 7-4. Format of Timer Clock Selection Register 50 (TCL50)
TCL501
6
0
0
0
1
1
0
0
1
1
CHAPTER 7 8-BIT TIMER/EVENT COUNTER 50
R/W
TCL500
User’s Manual U16846EJ3V0UD
5
0
0
1
0
1
0
1
0
1
TI50 pin falling edge
TI50 pin 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