AT80C51RD2-RLTIM Atmel, AT80C51RD2-RLTIM Datasheet - Page 67

• Manufacturer Part Number: AT80C51RD2-RLTIM
• Description: IC MCU 8051 5V SPI 20MHZ 44-VQFP
• Manufacturer: Atmel
• Series: 80Cr

Specifications of AT80C51RD2-RLTIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

17.3.2
64
AT80C51RD2
External Program Memory Characteristics
Table 17-2.
Table 17-3.
Symbol Description
AC Parameters for a Fix Clock
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
LHLL
AVLL
LLAX
LLPL
AVIV
PLAZ
PLIV
PXIX
PXIZ
LLIV
T
Parameter
Oscillator clock period
ALE pulse width
Address Valid to ALE
Address Hold After ALE
ALE to Valid Instruction In
ALE to PSEN
PSEN Pulse Width
PSEN to Valid Instruction In
Input Instruction Hold After PSEN
Input Instruction FloatAfter PSEN
Address to Valid Instruction In
PSEN Low to Address Float
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
LHLL
AVLL
LLAX
LLPL
AVIV
PLAZ
PLIV
PXIX
PXIZ
LLIV
T
Min
25
35
50
5
5
5
0
-M
4113D–8051–01/09
Max
65
30
10
80
10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns