upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 172

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

172
Notes 1.
Cautions 1. When the internal oscillation clock is selected as the clock to be supplied to the CPU, the
Address: FFB7H
Symbol
PRM01
2.
2. Always set data to PRM01 after stopping the timer operation.
3. If the valid edge of TI001 is to be set for the count clock, do not set the clear & start mode
4. If the TI001 or TI011 pin is high level immediately after system reset, the rising edge is
5. When the valid edge of the TI011 pin is used, P06 cannot be used as the timer output (TO01)
Set the count clock to satisfy the following conditions.
• V
• V
• V
• V
The external clock requires a pulse longer than two cycles of the internal clock (f
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 16-bit timer/event counter 01 is not
guaranteed.
selected and supplied to the CPU, the operation of 16-bit timer/event counter 01 is not
guaranteed, either, because the internal oscillation clock is supplied as the sampling clock to
eliminate noise.
using the valid edge of TI001 and the capture trigger.
immediately detected after the rising edge or both the rising and falling edges are set as the
valid edge(s) of the TI001 pin or TI011 pin to enable the operation of 16-bit timer counter 01
(TM01). Care is therefore required when pulling up the TI001 or TI011 pin. However, if the
TI001 pin or TI011 pin is high level when re-enabling operation after the operation has been
stopped, the rising edge is not detected.
pin. Moreover, when the TO01 pin is used, the valid edge of the TI011 pin cannot be used.
DD
DD
DD
DD
PRM011
ES111
ES111
ES011
= 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
7
0
0
1
1
0
0
1
1
0
0
1
1
After reset: 00H
Figure 7-13. Format of Prescaler Mode Register 01 (PRM01)
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
PRM010
ES110
ES010
ES110
When an external clock is used and when the internal oscillation clock is
6
0
1
0
1
0
1
0
1
0
1
0
1
R/W
Falling edge
Rising edge
Setting prohibited
Both rising and falling edges
Falling edge
Rising edge
Setting prohibited
Both rising and falling edges
f
f
f
TI001 valid edge
X
X
X
/2
/2
(10 MHz)
ES011
4
6
(625 kHz)
(156.25 kHz)
User’s Manual U15947EJ3V1UD
5
ES010
Note 2
4
TI011 valid edge selection
TI001 valid edge selection
Count clock selection
3
0
2
0
Note 1
PRM011
1
X
).
PRM010
0