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(3) Square wave output
A square wave of arbitrary frequency can be output.
Table 6-3. Square Wave Output Range of 8-Bit Timer/Event Counter 01
Minimum Pulse Width
(2.67 µ s)
4
2
/f
X
(42.7 µ s)
8
2
/f
X
Remarks 1. f
: System clock oscillation frequency
X
2. The parenthesized values apply to operation at f
6.2 Configuration of 8-Bit Timer/Event Counters 00 and 01
8-bit timer/event counters 00 and 01 consist of the following hardware.
Table 6-4. Configuration of 8-Bit Timer/Event Counters 00 and 01
Item
Timer counter
Register
Timer outputs
Control registers
6
f
/2
X
9
f
/2
X
80
CHAPTER 6
8-BIT TIMER/EVENT COUNTERS 00 AND 01
Maximum Pulse Width
(682.7 µ s)
12
2
/f
X
16
2
/f
(10.9 ms)
X
8 bits × 2 (TM00 and TM01)
Compare register: 8 bits × 2 (CR00 and CR01)
1 (TO01)
8-bit timer mode control registers 00 and 01 (TMC00 and TMC01)
Port mode register 2 (PM2)
Figure 6-1. Block Diagram of 8-Bit Timer 00
8-bit compare register 00
(CR00)
Match
8-bit timer counter 00
(TM00)
Clear
Selector
TCE00 TCL000
Internal bus
User's Manual U12978EJ3V0UD
(2.67 µ s)
4
2
/f
X
(42.7 µ s)
8
2
/f
X
= 6.0 MHz
X
Configuration
Internal bus
8-bit timer mode control register 00 (TMC00)
Resolution
INTTM00
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