AT80C51RD2-RLTIM Atmel, AT80C51RD2-RLTIM Datasheet - Page 71

• 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: -

17.3.6
17.3.7
68
AT80C51RD2
External Data Memory Read Cycle
Serial Port Timing - Shift Register Mode
PORT 0
PORT 2
ALE
PSEN
RD
OR SFR-P2
ADDRESS
Table 17-7.
Table 17-8.
Symbol
Symbol Description
AC Parameters for a Fix Clock
T
T
T
T
T
QVHX
XHQX
XHDX
XHDV
XLXL
A0-A7
T
LLAX
T
AVWL
T
LLWL
Parameter
Serial port clock cycle time
Output data set-up to clock rising edge
Output data hold after clock rising edge
Input data hold after clock rising edge
Clock rising edge to input data valid
T
AVDV
T
LLDV
ADDRESS A8-A15 OR SFR P2
Symbol
T
T
T
T
T
QVHX
XHQX
XHDX
XHDV
XLXL
T
RLAZ
T
RLRH
DATA IN
Min
300
200
30
0
T
T
WHLH
RHDX
-M
T
RHDZ
4113D–8051–01/09
Max
117
Units
ns
ns
ns
ns
ns