P-87C51 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
P-87C51 Datasheet PDF : 57 Pages
| |||
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)
Preliminary data
80C3xX2; 80C5xX2;
87C5xX2
TCON
Address = 88H
Bit Addressable
Reset Value = 00H
7
6
5
4
3
2
1
0
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
BIT
TCON.7
TCON.6
TCON.5
TCON.4
TCON.3
TCON.2
TCON.1
TCON.0
SYMBOL
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
FUNCTION
Timer 1 overflow flag. Set by hardware on Timer/Counter overflow.
Cleared by hardware when processor vectors to interrupt routine, or clearing the bit in software.
Timer 1 Run control bit. Set/cleared by software to turn Timer/Counter on/off.
Timer 0 overflow flag. Set by hardware on Timer/Counter overflow.
Cleared by hardware when processor vectors to interrupt routine, or by clearing the bit in software.
Timer 0 Run control bit. Set/cleared by software to turn Timer/Counter on/off.
Interrupt 1 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
Interrupt 1 type control bit. Set/cleared by software to specify falling edge/low level triggered
external interrupts.
Interrupt 0 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
Interrupt 0 Type control bit. Set/cleared by software to specify falling edge/low level
triggered external interrupts.
SU01516
Figure 3. Timer/Counter 0/1 Control (TCON) Register
OSC
Timer n
Gate bit
INTn Pin
÷ 12
÷6
Tn Pin
X2 = 0
X2 = 1
TRn
C/T = 0
C/T = 1
Control
TLn
(8 Bits)
Reload
THn
(8 Bits)
Figure 4. Timer/Counter 0/1 Mode 2: 8-Bit Auto-Reload
TFn
Interrupt
SU01582
2001 Sep 24
14
|
|
Share Link: 