UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 275
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UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 275 of 759
- Download datasheet (3Mb)
(3) External event counter
9.2 CONFIGURATION
f
f
f
f
CLK
XX
XX
XX
* Selected by means of the sampling clock selection register (SCS0)
Timer/counter 1 consists of the following registers:
• Timer register (TM1/TM1W)
• Compare register (CR10/CR10W)
• Capture/compare register (CR11/CR11W)
• Capture register (CR12/CR12W)
The block diagram of timer/counter 1 is shown in Figure 9-1.
/64
/128
/256
Counts the clock pulses input from the external interrupt request input pin (INTP0).
The clocks that can be input to timer/counter 1 are shown in Table 9-3.
Sampling Clock*
Table 9-3 Timer/Counter 1 Pulse Width Measurement Time
Minimum pulse width
Minimum pulse width
Minimum pulse width
Minimum pulse width
(High and low levels)
(High and low levels)
(High and low levels)
(High and low levels)
Maximum frequency
Maximum frequency
Maximum frequency
Maximum frequency
1
1
1
CHAPTER 9 TIMER/COUNTER 1
1
f
4/f
f
256/f
f
512/f
f
1024/f
CLK
XX
XX
XX
CLK
/512 (48.8 kHz)
/1024 (24.4 kHz)
/2048 (12.2 kHz)
When Counting One Edge
/8 (1.56 MHz)
XX
XX
(0.32 s)
XX
(10.2 s)
(20.5 s)
(41.0 s)
( ): When f
f
4/f
f
256/f
f
512/f
f
1024/f
CLK
XX
XX
XX
When Counting Both Edges
CLK
CLK
/512 (48.8 kHz)
/1024 (24.4 kHz)
/2048 (12.2 kHz)
/8 (1.56 MHz)
XX
XX
(0.32 s)
= 12.5 MHz and f
XX
(10.2 s)
(20.5 s)
(41.0 s)
XX
= 25 MHz
235
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