Q & a, 5 how do i reverse the output level – FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 38 Reload Timer
7.Q & A
7. Q & A
7.1 What is the reload value setting (rewriting) procedure?
The reload value is set by the 16 bit reload registers TMRLR0-TMRLR7.
The equation for the values to be set is as follows.
• Formula
TMRLR register value = {reload interval/count clock}-1
• Allowed Range
TMRLR register value = 0~FFFh (65535)
7.2 What are the kinds of count clocks and how are they selected?
The count clock is chosen from the 4 types in the table below.
Selection is done via the count clock selection bit.
Table 7-1 TMCSR.CSL[2:0]
(*: See “
7.3 How to I enable/disable the reload timer count operation?
Use the timer count enable bit (TMCSR.CNTE).
Cannot be reopened from the stopped state. Enable before activation or simultaneous with activation.
7.4 How do I set the reload timer mode (reload/one-shot)?
Use mode selection bit (TMCSR.RELD).
7.5 How do I reverse the output level?
The settings for the output level are detailed in the following table.
The setting is done via timer output level bit (TMCSR.OUTL).
Count
Clock
Counter clock selection bit
Count clock example
CSL2
CSL1
CSL0
When CLKP=
32MHz
When CLKP=
16MHz
When CLKP= 8MHz
CLKP/2
0
0
0
62.5ns
125ns
250ns
CLKP/8
0
0
1
250ns
500ns
1.0
µs
CLKP/32
0
1
0
1.0
µs
2.0
µs
4.0
µs
External event
0
1
1
Pulse width: 2/CLKP min
CLKP/64
1
0
1
2.0
µs
4.0
µs
8.0
µs
CLKP/128
1
1
0
4.0
µs
8.0
µs
16.0
µs
Disabled *
1
0
0
-----
1
1
1
-----
Control Details
RLT operation permission bit (CNTE)
To stop the reload timer
Set to “0”
To enable the reload timer’s count operation
Set to “1”
Operation Mode
Mode selection bit (RELD)
To set to one-shot mode
Set to “0”
To set to reload
Set to “1”
Output level
Timer output level bit (OUTL)