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AT89C55WD Datasheet(PDF) 13 Page - ATMEL Corporation

Part # AT89C55WD
Description  8-bit Microcontroller with 20K Bytes Flash
PDF  35 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C55WD Datasheet(HTML) 13 Page - ATMEL Corporation

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13
1921C–MICRO–3/05
AT89C55WD
Figure 12-3. Timer 2 Auto Reload Mode (DCEN = 1)
Table 12-2.
T2MOD – Timer 2 Mode Control Register
T2MOD Address = 0C9H
Reset Value = XXXX XX00B
Not Bit Addressable
––––––
T2OE
DCEN
Bit
76543210
Symbol
Function
–
Not implemented, reserved for future
T2OE
Timer 2 Output Enable bit
DCEN
When set, this bit allows Timer 2 to be configured as an up/down counter
OSC
EXF2
TF2
T2EX PIN
COUNT
DIRECTION
1=UP
0=DO
T2 PIN
TR2
CONTROL
OVERFLOW
TOGGLE
TIMER 2
INTERRUPT
12
RCAP2L
RCAP2H
0FFH
0FFH
TH2
TL2
C/T2 = 0
C/T2 = 1
÷
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)



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