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P87C51RD2BA
P87C51RD2BA | |
|---|---|
| Manufacturer Part Number | P87C51RD2BA |
| Description | 357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO |
| Manufacturer | NXP Semiconductors |
| P87C51RD2BA datasheets |
|
Availability: In stock
International delivery:
Warranty: 60 days
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Philips Semiconductors
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
OSC
d*
Tn Pin
TRn
Timer n
Gate bit
INTn Pin
*d = 6 in 6-clock mode; d = 12 in 12-clock mode.
Figure 3. Timer/Counter 0/1 Mode 0: 13-Bit Timer/Counter
TCON
Address = 88H
Bit Addressable
7
TF1
TR1
BIT
SYMBOL
FUNCTION
TCON.7
TF1
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.
TCON.6
TR1
Timer 1 Run control bit. Set/cleared by software to turn Timer/Counter on/off.
TCON.5
TF0
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.
TCON.4
TR0
Timer 0 Run control bit. Set/cleared by software to turn Timer/Counter on/off.
TCON.3
IE1
Interrupt 1 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
TCON.2
IT1
Interrupt 1 type control bit. Set/cleared by software to specify falling edge/low level triggered
external interrupts.
TCON.1
IE0
Interrupt 0 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
TCON.0
IT0
Interrupt 0 Type control bit. Set/cleared by software to specify falling edge/low level
triggered external interrupts.
Figure 4. Timer/Counter 0/1 Control (TCON) Register
2003 Jan 24
8KB/16KB/32KB/64KB OTP
C/T = 0
TLn
(5 Bits)
C/T = 1
Control
6
5
4
3
2
TF0
TR0
IE1
IT1
14
Product data
P87C51RA2/RB2/RC2/RD2
THn
TFn
Interrupt
(8 Bits)
SU01618
Reset Value = 00H
1
0
IE0
IT0
SU01516
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