TS80C51RA2 Atmel Corporation, TS80C51RA2 Datasheet - Page 62

• Manufacturer Part Number: TS80C51RA2
• Description: High Performance 8-bit Microcontroller
• Manufacturer: Atmel Corporation

External Program Memory
Characteristics
62
TS8xC51Rx2
Example:
T
Table 38. Symbol Description
LLIV
Symbol
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 40.)
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
E6
= 50 ns):
4188A–8051–10/02