AT89C5122D-RDRIM Atmel, AT89C5122D-RDRIM Datasheet - Page 171
![IC MCU 80C51 W/SMART CARD 64VQFP](/photos/6/81/68127/313-64-vqfp_sml.jpg)
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
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Power On Reset (POR)
Power Fail Detector
(PFD)
4202F–SCR–07/2008
The role of the POR is to monitor the power supply rise of the microcontroller core and
release the internal reset only when the internal voltage exceeds the VPFDP threshold
from which the microcontroller core is stable (see Figure 101). This feature replaces the
external reset function and therefore avoid the use of external components on the reset
pin.
The role of the PFD is to monitor the power supply falls during a steady state condition
in order to suspend the microcontroller and peripherals activity as soon as the power
supply drops below the VPFDM threshold from which the microcontroller’s core might
become instable (see Figure 101). The PDF suspends the microcontroller’s activity by
holding the microcontroller under a reset state to avoid an unpredictable behaviour.
A filter prevents the system from reseting when glitches lower than 50 ns duration are
carried on Vcore. See Figure 101 and Figure 102 on page 172.
AT83R5122, AT8xC5122/23
171
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