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HD404339FS Datasheet(PDF) 41 Page - Renesas Technology Corp

Part # HD404339FS
Description  microcomputer with large-capacity memory designed to
PDF  80 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404339FS Datasheet(HTML) 41 Page - Renesas Technology Corp

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HD404339 Series
39
Bit
Initial value
Read/Write
Bit name
3
0
W
TMA3
2
0
W
TMA2
0
0
W
TMA0
1
0
W
TMA1
Timer mode register A (TMA: $008)
0
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PSS
PSS
PSS
PSS
PSS
PSS
PSS
PSS
PSW
PSW
PSW
PSW
PSW
Operating Mode
Timer A mode
TMA3
TMA1
TMA2
TMA0
Source
Prescaler
2048 tcyc
1024tcyc
512tcyc
128tcyc
32 tcyc
8 tcyc
4 tcyc
2 tcyc
Input Clock
Frequency
0
1
1
32t
16t
8t
2t
1/2t
Time-base
mode
0
0
1
1
0
1
1
Not used
PSW and TCA reset
X
Notes:
Wcyc
Wcyc
Wcyc
Wcyc
Wcyc
X = Don’t care.
1.
2.
3.
t
= 244.14
µs (when a 32.768-kHz crystal oscillator is used)
Timer counter overflow output period (seconds) = input clock period (seconds)
256.
The division ratio must not be modified during time-base mode operation,
otherwise an overflow cycle error will occur.
Wcyc
×
Figure 28 Timer Mode Register A (TMA)



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