AT80C51RD2-SLSIM Atmel, AT80C51RD2-SLSIM Datasheet - Page 69

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

Specifications of AT80C51RD2-SLSIM

• 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-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

66
AT80C51RD2
Table 17-5.
Table 17-6.
Symbol
Symbol Description
AC Parameters for a Fix Clock
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
RLRH
RHDZ
AVDV
RLDV
LLDV
LLWL
RLAZ
Parameter
RD Pulse Width
WR Pulse Width
RD to Valid Data In
Data Hold After RD
Data Float After RD
ALE to Valid Data In
Address to Valid Data In
ALE to WR or RD
Address to WR or RD
Data Valid to WR Transition
Data set-up to WR High
Data Hold After WR
RD Low to Address Float
RD or WR High to ALE high
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
RLRH
RHDZ
AVDV
RLDV
LLDV
LLWL
RLAZ
Min
125
125
155
45
70
10
0
5
0
5
-M
Max
155
160
105
95
25
45
4113D–8051–01/09
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns