AT89C51IC2-RLTIL Atmel, AT89C51IC2-RLTIL Datasheet - Page 15

• 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: -

4301D–8051–02/08
Table 15. OSCCON Register
OSCCON- Oscillator Control Register (86h)
Reset Value = XXXX X0’HSB.OSC’’HSB.OSC’b (see Hardware Security Byte (HSB)
Table 84)
Not bit addressable
Table 16. CKRL Register
CKRL - Clock Reload Register
Reset Value = 1111 1111b
Not bit addressable
Number
Number
Bit
Bit
7:0
7
7
-
-
7
6
5
4
3
2
1
0
Mnemonic Description
Mnemonic Description
SCLKT0
OscBEn
OscAEn
CKRL
Bit
6
6
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
Sub Clock Timer0
Cleared by software to select T0 pin
Set by software to select T0 Sub Clock
Cleared by hardware after a Power Up
OscB enable bit
Set by software to run OscB
Cleared by software to stop OscB
Programmed by hardware after a Power-up regarding HSB.OSC (Default
cleared, OSCB stopped)
OscA enable bit
Set by software to run OscA
Cleared by software to stop OscA
Programmed by hardware after a Power-up regarding HSB.OSC(Default Set,
OSCA runs)
Clock Reload Register:
Prescaler value
5
5
-
-
4
4
-
-
3
3
-
-
SCLKT0
2
2
-
OscBEn
1
1
-
OscAEn
0
0
-
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