80C52 Datasheet, PDF (15/23 Pages) Intel Corporation – CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

8XC52 54 58
EXTERNAL MEMORY CHARACTERISTICS (Continued)
All parameter values apply to all devices unless otherwise indicated
Oscillator
Symbol Parameter
12 MHz 24 MHz 33 MHz
Variable
Units
Min Max Min Max Min Max
Min
Max
TQVWX Data Valid to
WR Transition
8XC5X
33
TCLCL ^b 50
ns
8XC5X-24 33
12
0
TCLCL ^b 30
ns
TWHQX Data Hold After
WR
8XC5X
33
TCLCL ^b 50
ns
8XC5X-24
7
TCLCL ^b 35
ns
8XC5X-33
3
TCLCL ^b 27
ns
TQVWH Data Valid to
WR High
8XC5X
433
7 TCLCL ^b 150
ns
8XC5X-24 33
222
142
7 TCLCL ^b 70
ns
TRLAZ RD Low to
Address Float
0
0
0
0
ns
TWHLH RD or WR High
to ALE High
8XC5X
43 123
TCLCL ^b 40 TCLCL ^a 40 ns
8XC5X-24
12 71
TCLCL ^b 30 TCLCL ^a 30 ns
8XC5X-33
5 55 TCLCL ^b 25 TCLCL ^a 25 ns
15