AT89C51IC2-SLRIM Atmel, AT89C51IC2-SLRIM Datasheet - Page 105
![IC MCU FLASH 8051 32K 5V 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
AT89C51IC2-SLRIM
Manufacturer Part Number
AT89C51IC2-SLRIM
Description
IC MCU FLASH 8051 32K 5V 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51IC2-SLRIM.pdf
(147 pages)
Specifications of AT89C51IC2-SLRIM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
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 ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C51IC2SLRIMTR
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ONCE
Chip Emulation)
4301D–8051–02/08
(TM)
Mode (ON
The ONCE mode facilitates testing and debugging of systems using AT89C51IC2 with-
out removing the circuit from the board. The ONCE mode is invoked by driving certain
pins of the AT89C51IC2; the following sequence must be exercised:
•
•
While the AT89C51IC2 is in ONCE mode, an emulator or test CPU can be used to drive
the circuit Table 82 shows the status of the port pins during ONCE mode.
Normal operation is restored when normal reset is applied.
Table 82. External Pin Status during ONCE Mode
(a) "Once" is a registered trademark of Intel Corporation.
pull-up
Weak
ALE
Pull ALE low while the device is in reset (RST high) and PSEN is high.
Hold ALE low as RST is deactivated.
PSEN
pull-up
Weak
Port 0
Float
Port 1
pull-up
Weak
Port 2
pull-up
Weak
Port 3
pull-up
Weak
Port I2
Float
XTALA1/2
Active
XTALB1/2
Active
105
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