AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 174

IC 8051 MCU 32K CRAM USB 64-VQFP

AT89C5122D-RDRUM

Manufacturer Part Number
AT89C5122D-RDRUM
Description
IC 8051 MCU 32K CRAM USB 64-VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet

Specifications of AT89C5122D-RDRUM

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
AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C5122D-RDRUMTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT89C5122D-RDRUM
Manufacturer:
Atmel
Quantity:
10 000
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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