AT87C52X2-3CSUL Atmel, AT87C52X2-3CSUL Datasheet - Page 41

• Manufacturer Part Number: AT87C52X2-3CSUL
• Description: IC 8051 MCU 8K OTP 30MHZ 40DIP
• Manufacturer: Atmel
• Series: 87Cr

Specifications of AT87C52X2-3CSUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 30/20MHz
• Connectivity: UART/USART
• Peripherals: POR
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

External Program Memory
Characteristics
4184G–8051–09/06
Table 28., Table 31. and Table 34. give the frequency derating formula of the AC param-
eter. To calculate each AC symbols, take the x value corresponding to the speed grade
you need (-M, -V or -L) and replace this value in the formula. Values of the frequency
must be limited to the corresponding speed grade:
Table 25. Max frequency for derating formula regarding the speed grade
Example:
T
Table 26. Symbol Description
LLIV
Freq (MHz)
Symbol
T (ns)
T
T
T
T
T
T
T
T
T
T
T
T
in X2 mode for a -V part at 20 MHz (T = 1/20
AVLL
LLAX
PLPH
PXAV
PLAZ
LHLL
LLPL
PXIX
AVIV
x= 22 (Table 28.)
T= 50ns
T
PLIV
PXIZ
LLIV
T
LLIV
= 2T - x = 2 x 50 - 22 = 78ns
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
PSEN to Address Valid
Address to Valid Instruction In
PSEN Low to Address Float
-M X1 mode
40
25
-M X2 mode
20
50
-V X1 mode
40
25
E6
-V X2 mode
= 50 ns):
33.3
30
-L X1 mode
TS8xCx2X2
33.3
30
-L X2 mode
20
50
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