AT89C51IC2-RLTIL Atmel, AT89C51IC2-RLTIL Datasheet - Page 20

• Manufacturer Part Number: AT89C51IC2-RLTIL
• Description: IC 8051 MCU FLASH 32K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51IC2-RLTIL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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.
CLK CPU
Sub Clock
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
)
)
4301D–8051–02/08