UPD78F9418A NEC, UPD78F9418A Datasheet - Page 114

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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114
7.1 Function of 8-Bit Timer/Event Counters 00 to 02
and timer 01) and one 8-bit timer channel (timer 02). When reading the description of timer 02, timer/event counter
should be read as a timer.
2
2
2
2
2
2
1/f
6
9
4
8
3
7
/f
/f
/f
/f
/f
/f
XT
X
X
X
X
X
X
8-bit timer/event counters 00 to 02 have the following functions.
• Interval timer (timer 00, timer 01, and timer 02)
• External event counter (timer 00 and timer 01 only)
• Square-wave output (timer 02 only)
The µ PD789407A and µ PD789417A Subseries are provided with two 8-bit timer/event counter channels (timer 00
(1)
Remarks 1. f
Remarks 1. f
Remarks 1. f
(12.8 µ s)
(102.4 µ s)
(3.2 µ s)
(51.2 µ s)
(1.6 µ s)
(25.6 µ s)
(30.5 µ s)
Minimum Interval Time
Minimum Interval Time
Minimum Interval Time
8-bit interval timer
When the 8-bit timer/event counter is used as an interval timer, it generates an interrupt at an arbitrary time
interval set in advance.
2. The parenthesized values apply to operation at f
2. The parenthesized values apply to operation at f
2. f
3. The parenthesized values apply to operation at f
X
X
X
XT
: Main system clock oscillation frequency
: Main system clock oscillation frequency
:
: Subsystem clock oscillation frequency
Main system clock oscillation frequency
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 00 TO 02
Table 7-1. Interval Time of 8-Bit Timer/Event Counter 00
Table 7-2. Interval Time of 8-Bit Timer/Event Counter 01
Table 7-3. Interval Time of 8-Bit Timer 02
2
2
2
2
2
2
2
14
17
12
16
11
15
8
/f
/f
/f
/f
/f
/f
/f
XT
X
X
X
X
X
X
(3.28 ms)
(26.2 ms)
(819.2 µ s)
(13.1 ms)
(409.6 µ s)
(6.55 ms)
(7.81 ms)
User’s Manual U13952EJ3V0UD
Maximum Interval Time
Maximum Interval Time
Maximum Interval Time
X
X
X
= 5.0 MHz.
= 5.0 MHz.
= 5.0 MHz or f
2
2
2
2
2
2
1/f
6
9
4
8
3
7
/f
/f
/f
/f
/f
/f
XT
XT
X
X
X
X
X
X
(102.4 µ s)
(51.2 µ s)
(25.6 µ s)
= 32.768 kHz.
(30.5 µ s)
(12.8 µ s)
(3.2 µ s)
(1.6 µ s)
Resolution
Resolution
Resolution