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CHAPTER 16 8-/16-BIT PPG TIMER
■ Operation Modes of 8-/16-bit PPG Timer
●
8-bit PPG output 2-channel independent operation mode
The 8-bit PPG output 2-channel independent operation mode causes the 2-channel modules (PPGC and
PPGD) to operate as each independent 8-bit PPG timer.
Table 16.1-1 shows the interval times in the 8-bit PPG output 2-channel independent operation mode.
●
16-bit PPG output operation mode
The 16-bit PPG output operation mode concatenates the 2-channel modules (PPGC and PPGD) to operate
as a 16-bit 1-channel PPG timer.
Table 16.1-2 shows the interval times in this mode.
Table 16.1-1 Interval Times in 8-bit PPG Output 2-channel Independent Operation Mode
Count Clock Cycle
PPGC, PPGD
Interval Time Output Pulse Time
1/φ(41.7 ns)
1/φ to 2
8
/φ 2/φ to 2
9
/φ
2/φ(83.3 ns)
2/φ to 2
9
/φ 2
2
/φ to 2
10
/φ
2
2
/φ(167 ns) 2
2
/φ to 2
10
/φ 2
3
/φ to 2
11
/φ
2
3
/φ(333 ns) 2
3
/φ to 2
11
/φ 2
4
/φ to 2
12
/φ
2
4
/φ(667 ns) 2
4
/φ to 2
12
/φ 2
5
/φ to 2
13
/φ
2
9
/HCLK(128 µs) 2
9
/HCLK to 2
17
/HCLK 2
10
/HCLK to 2
18
/HCLK
HCLK: Oscillation clock
φ : Machine clock
The parenthesized values are provided when the oscillation clock operates at 4 MHz and the machine clock operates
at 24 MHz.
Table 16.1-2 Interval Times in 16-bit PPG Output Operation Mode
Count clock cycle Interval time Output pulse time
1/φ(41.7 ns)
1/φ to 2
16
/φ 2/φ to 2
17
/φ
2/φ(83.3 ns)
2/φ to 2
17
/φ 2
2
/φ to 2
18
/φ
2
2
/φ(167 ns) 2
2
/φ to 2
18
/φ 2
3
/φ to 2
19
/φ
2
3
/φ(333 ns) 2
3
/φ to 2
19
/φ 2
4
/φ to 2
20
/φ
2
4
/φ(667 ns) 2
4
/φ to 2
20
/φ 2
5
/φ to 2
21
/φ
2
9
/HCLK(128 µs) 2
9
/HCLK to 2
25
/HCLK 2
10
/HCLK to 2
26
/HCLK
HCLK: Oscillation clock
φ : Machine clock
The parenthesized values are provided when the oscillation clock operates at 4 MHz and the machine clock operates
at 24 MHz.