AT89C51RC-24PC View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT89C51RC-24PC' PDF : 36 Pages View PDF
AT89C51RC
Figure 13-2. Timer 2 Auto Reload Mode (DCEN = 0)
OSC
12
C/T2 = 0
T2 PIN
C/T2 = 1
CONTR OL
TR2
RELO AD
T2EX PIN
TRANSITION
DETECTOR
CONTROL
EXEN2
TH2
TL2
OVERFLOW
RCAP2H RCAP2L
TF2
EXF2
TIMER 2
INTERRUPT
Table 13-2. T2MOD—Timer 2 Mode Control Register
T2MOD Address = 0C9H
Reset Value = XXXX XX00B
Not Bit Addressable
–
–
–
–
–
–
T2OE
DCEN
Bit
7
6
5
4
3
2
1
0
Symbol
–
T2OE
DCEN
Function
Not implemented, reserved for future
Timer 2 Output Enable bit
When set, this bit allows Timer 2 to be configured as an up/down counter
Figure 13-3. Timer 2 Auto Reload Mode (DCEN = 1)
(DOWN COUNTING RELOAD VALUE)
0FFH
0FFH
TOGGLE
EXF2
OSC
12
T2 PIN
C/T2 = 0
C/T2 = 1
OVERFLOW
TH2
TL2
CONTROL
TR2
TF2
TIMER 2
INTERRUPT
RCAP2H RCAP2L
(UP COUNTING RELOAD VALUE)
COUNT
DIRECTION
1=UP
0=DO
T2EX PIN
15
1920C–MICRO–03/05
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