Table of Contents
Advertisement
CHAPTER 13 PWC TIMER
13.3 Movement of PWC Timer
■ Selects Operation Mode
Select each of operation and measurement modes by setting the PWCSR bit.
• Operation mode selection: PWCSR bit2, bit1, bit0 (MOD2, MOD1, and MOD0 bits) timer mode/pulse
• Measurement mode setting: PWCSR bit3 (S/C bit) single measurement/continuous measurement or
Table 13.3-2 shows the setting contents of operation mode/measurement mode.
Table 13.3-2 Setting Contents of Operation Mode/measurement Mode Content
Timer
↑ or ↓ - ↑ or ↓
Pulse width
measurement
Measurement between all
edges
Measurement at cycle of
dividing frequency
1 to 256 frequency
division
↑ - ↑
Measurement of cycle
between rising
↑ - ↓
"H" pulse width
measurement
↓ - ↑
"L" pulse width
measurement
↓ - ↓
Measurement of cycle
between falling
• One-shot timer is selected in the initial setting after the reset.
Note:
Select the operation mode always before starting the timer.
304
width measurement mode selection, measurement edge decision, etc.
reload/one-shot selection.
Operating mode
Single shot timer
Reload timer
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
Single measurement: Buffer invalidity
Continuous measurement: Buffer effective
FUJITSU MICROELECTRONICS LIMITED
MB90335 Series
S/C
MOD2 MOD1 MOD0
0
0
0
1
0
0
0
0
1
1
0
1
0
0
1
1
0
1
0
1
0
1
1
0
0
1
0
1
1
0
0
1
1
1
1
1
0
1
1
1
1
1
CM44-10137-6E
0
0
0
0
1
1
0
0
1
1
0
0
1
1
Advertisement
Table of Contents
