P87C654X2 Datasheet, PDF (15/88 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 16 kB OTP/ROM, 256B RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Philips Semiconductors
80C51 8-bit microcontroller family 16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
Product data
P83C654X2/P87C654X2
OSC
÷ d*
Tn Pin
C/T = 0
C/T = 1
TRn
Timer n
Gate bit
INTn Pin
*d = 6 in 6-clock mode; d = 12 in 12-clock mode.
Control
TLn
(8 Bits)
Reload
THn
(8 Bits)
Figure 5. Timer/Counter 0/1 Mode 2: 8-Bit Auto-Reload
TFn
Interrupt
SU01619
OSC
÷ d*
T0 Pin
TR0
Timer 0
Gate bit
INT0 Pin
C/T = 0
C/T = 1
Control
TL0
(8 Bits)
OSC
÷ d*
TR1
*d = 6 in 6-clock mode; d = 12 in 12-clock mode.
Control
TH0
(8 Bits)
Figure 6. Timer/Counter 0 Mode 3: Two 8-Bit Counters
TF0
Interrupt
TF1
Interrupt
SU01620
2004 Apr 20
15