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MPC89x53AF Datasheet(PDF) 18 Page - Megawin Technology Co., Ltd

Part # MPC89x53AF
Description  8-bit micro-controller
PDF  38 Pages
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Manufacturer  MEGAWIN [Megawin Technology Co., Ltd]
Direct Link  http://www.megawin.com.tw/megawin_EN/Index.asp
Logo MEGAWIN - Megawin Technology Co., Ltd

MPC89x53AF Datasheet(HTML) 18 Page - Megawin Technology Co., Ltd

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Auto-Reload Up-Only Mode (ARUO)
In ARUO mode, Timer2 can be configured to count up with a software-defined value to be
reloaded. When reset is applied to the DCEN =0 and CP/RL2=0, Timer2 is at ARUO mode. An
overflow on Timer2 or 1-to-0 transition on T2EX pin will load RCAP2H and RCAP2L contents
onto Timer2, also set TF2 and EXF2, respectively.
0
1
OSC/12
T2 pin
0
1
TR2
TL2 [7:0]
TF2
Interrupt
C//T2
TH2[7:0]
RCAP2L [7:0]
RCAP2H [7:0]
T2EX pin
EXEN2
EXF2
Auto-Reload Up-Down Mode (ARUD)
In ARUD mode, Timer2 can be configured to count up or down. When DCEN =1 and
CP/RL2=0, Timer2 is at ARUD mode. The counting direction is determined by T2EX pin. If
T2EX=1, counting up, otherwise counting down. An overflow on Timer2 will set TF2 and toggle
EXF2. EXF2 cannot generate interrupt request in this mode. If the counting direction is DOWN,
the overflow loads 0xFFFF onto Timer2 and if counting direction is UP, the overflow loads
RCAP2H, RCAP2L contents onto Timer2.
0
1
OSC/12
T2 pin
0
1
TR2
TL2 [7:0]
TF2
C//T2
TH2[7:0]
RCAP2L [7:0]
RCAP2H [7:0]
FFH
FFH
EXF2
T2EX pin
Interrupt
18
MPC89x53A Data Sheet
MEGAWIN



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