AT89C5122D-RDRIM Atmel, AT89C5122D-RDRIM Datasheet - Page 174
AT89C5122D-RDRIM
Manufacturer Part Number
AT89C5122D-RDRIM
Description
IC MCU 80C51 W/SMART CARD 64VQFP
Manufacturer
Atmel
Series
89Cr
Specifications of AT89C5122D-RDRIM
Core Processor
8051
Core Size
8-Bit
Speed
48MHz
Connectivity
SmartCard, SPI, UART/USART, USB
Peripherals
LED, POR, WDT
Number Of I /o
46
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C5122DRDRIMTR
Available stocks
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Manufacturer
Quantity
Price
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Reset Controlled by an
External Superviser Device
174
AT83R5122, AT8xC5122/23
As the reset pin can be forced in output by the Watch-Dog timer (WDT) or the POR/PFD
features, there can be a conflict between the external superviser device and the micro-
controller’s reset pin when in one side the external superviser is pulling the reset pin to
VCC and in another side the WDT or POR/PFD features tries to force the reset pin to
ground. Therefore, it recommended to insert a series resistor of 1.8K +/-10% or a diode
(1N4148 for instance) between the external superviser device and the reset pin as
detailed in the following figures.
Figure 105. Use of an External Serial Resistor
Figure 106. Use of an External Diode
Superviser
device
Superviser
device
1N4148
1.8 K
RST
RST
Vcc
Vcc
10 K
10 K
To other on-board
circuitry
To other on-board
circuitry
Microcontrolleur
Microcontrolleur
Power Fail
Watchdog
Power Fail
Watchdog
Power On
Power On
Detector
Detector
Timer
Timer
Reset
Reset
4202F–SCR–07/2008
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