Rainbow Electronics AT89C51RC - Manual (Page 10)

AT89C51RC
10
Figure 3. Timer 2 Auto Reload Mode (DCEN = 0)
OSC
EXF2
TF2
T2EX PIN
T2 PIN
TR2
EXEN2
C/T2 = 0
C/T2 = 1
CONTR OL
RELO AD
CONTROL
TRANSITION
DETECTOR
TIMER 2
INTERRUPT
12
RCAP2L RCAP2H
TH2 TL2
OVERFLOW
Table 5. 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 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