AT89C51IC2-RLTIM ATMEL [ATMEL Corporation], AT89C51IC2-RLTIM Datasheet - Page 20

• Manufacturer Part Number: AT89C51IC2-RLTIM
• Description: 8-bit Flash Microcontroller with 2-wire Interface
• Manufacturer: ATMEL [ATMEL Corporation]

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
C P U
C P U
=
=
F
F
C L K P E R I P H
C L K P E R I P H
, for CKRL<>0xFF
TMOD
C/T
1
0
=
=
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4
×
×
Control
(
(
255
255
F
F
O S C A
O S C A
–
–
C K R L
C K R L
Timer 0
)
)
4301C–8051–06/06