89C51IC2-CM ATMEL [ATMEL Corporation], 89C51IC2-CM Datasheet - Page 20
89C51IC2-CM
Manufacturer Part Number
89C51IC2-CM
Description
8-bit Flash Microcontroller with 2-wire Interface
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.89C51IC2-CM.pdf
(146 pages)
- Current page: 20 of 146
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Timer 0: Clock Inputs
20
AT89C51IC2
Figure 4. Timer 0: Clock Inputs
Note:
SCLKT0 = 0: Timer 0 uses the standard T0 pin as clock input (Standard mode)
SCLKT0 = 1: Timer 0 uses the special Sub Clock as clock input, this feature can be use
as periodic interrupt for time clock.
–
FCLK PERIPH
F
In X2 Mode:
In X1 Mode:
The SCLKT0 bit in OSCCON register allows to select Timer 0 Subsidiary clock.
Sub Clock
CLK CPU
T0 pin
INT0
TR0
Gate
and F
OSCCON
SCLKT0
CLK PERIPH
F
F
1
0
:6
CPU
CPU
=
=
F
F
CLKPERIPH
CLKPERIPH
, for CKRL<>0xFF
TMOD
C/T
1
0
=
=
--------------------------------------------- -
2
--------------------------------------------- -
4
Control
255 CKRL
255 CKRL
F
F
OSCA
OSCA
–
–
Timer 0
4301A–8051–01/04
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