AT89C51RC2-RLTIL Atmel, AT89C51RC2-RLTIL Datasheet - Page 14
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AT89C51RC2-RLTIL
Manufacturer Part Number
AT89C51RC2-RLTIL
Description
8-bit Microcontrollers - MCU 80C31 w/4k
Manufacturer
Atmel
Datasheet
1.AT89C51RC2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RC2-RLTIL
Product Category
8-bit Microcontrollers - MCU
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
60 MHz
Program Memory Size
32 KB
Data Ram Size
1280 B
On-chip Adc
No
Operating Supply Voltage
2.7 V to 5.5 V
Package / Case
VQFP-44
Mounting Style
SMD/SMT
Interface Type
SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
32
Number Of Timers
3
Program Memory Type
Flash
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RC2-RLTIL
Manufacturer:
ATMEL
Quantity:
5 000
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Oscillator
Registers
14
AT89C51RB2/RC2
To optimize the power consumption and execution time needed for a specific task, an
internal, prescaler feature has been implemented between the oscillator and the CPU
and peripherals.
Table 13. CKRL Register
CKRL – Clock Reload Register (97h)
Reset Value = 1111 1111b
Not bit addressable
Table 14. PCON Register
PCON – Power Control Register (87h)
Reset Value = 00X1 0000b Not bit addressable
SMOD1
CKRL7
Bit Number
Bit Number
7
7
7:0
7
6
5
4
3
2
1
0
SMOD0
CKRL6
6
6
Bit Mnemonic
Mnemonic
SMOD1
SMOD0
CKRL
POF
GF1
GF0
IDL
PD
-
CKRL5
5
-
5
Description
Clock Reload Register
Prescaler value
Description
Serial Port Mode bit 1
Set to select double baud rate in mode 1, 2 or 3.
Serial Port Mode bit 0
Cleared to select SM0 bit in SCON register.
Set to select FE bit in SCON register.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Power-off Flag
Cleared to recognize next reset type.
Set by hardware when V
also be set by software.
General-purpose Flag
Cleared by software for general-purpose usage.
Set by software for general-purpose usage.
General-purpose Flag
Cleared by software for general-purpose usage.
Set by software for general-purpose usage.
Power-down Mode bit
Cleared by hardware when reset occurs.
Set to enter power-down mode.
Idle Mode bit
Cleared by hardware when interrupt or reset occurs.
Set to enter idle mode.
CKRL4
POF
4
4
CKRL3
GF1
3
3
CC
rises from 0 to its nominal voltage. Can
CKRL2
GF0
2
2
CKRL1
PD
1
1
4180E–8051–10/06
CKRL0
IDL
0
0
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