80C31X2 Datasheet, PDF (20/62 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V, low power, high speed 30/33 MHz

Philips Semiconductors
80C51 8-bit microcontroller family
4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),
low power, high speed (30/33 MHz)
Product data
P80C3xX2; P80C5xX2;
P87C5xX2
OSC
÷ n*
T2 Pin
C/T2 = 0
C/T2 = 1
CONTROL
TL2
(8-BITS)
TH2
(8-BITS)
TRANSITION
DETECTOR
TR2 _RELOAD
RCAP2L
RCAP2H
TF2
T2EX PIN
CONTROL
*n = 6 in 6-clock mode; n = 12 in 12-clock mode.
EXEN2
Figure 9. Timer 2 in Auto-Reload Mode (DCEN = 0)
EXF2
TIMER 2
INTERRUPT
SU01623
(DOWN COUNTING RELOAD VALUE)
FFH
FFH
TOGGLE
EXF2
OSC
÷ n*
T2 Pin
C/T2 = 0
TL2
C/T2 = 1
CONTROL
TR2
OVERFLOW
TH2
*n = 6 in 6-clock mode; n = 12 in 12-clock mode.
RCAP2L
RCAP2H
(UP COUNTING RELOAD VALUE)
Figure 10. Timer 2 Auto Reload Mode (DCEN = 1)
TF2
COUNT
DIRECTION
1 = UP
0 = DOWN
T2EX PIN
INTERRUPT
SU01624
2003 Jan 24
20