UPSD3212A Datasheet, PDF (141/163 Pages) STMicroelectronics – Flash Programmable System Devices with 8032 MCU with USB and Programmable Logic

uPSD3212A, uPSD3212C, uPSD3212CV
Table 117. External Program Memory AC Characteristics (with the 3V MCU Module)
Symbol
Parameter⁽¹⁾
24MHz Oscillator
Min
Max
Variable Oscillator
1/t_CLCL = 8 to 24MHz
Unit
Min
Max
t_LHLL
ALE pulse width
43
2t_CLCL – 40
ns
t_AVLL
Address set up to ALE
17
t_CLCL – 25
ns
t_LLAX
Address hold after ALE
17
t_CLCL – 25
ns
t_LLIV
ALE Low to valid instruction in
80
4t_CLCL – 87 ns
t_LLPL
ALE to PSEN
22
t_CLCL – 20
ns
t_PLPH
PSEN pulse width
95
3t_CLCL – 30
ns
t_PLIV
PSEN to valid instruction in
60
3t_CLCL – 65 ns
t_PXIX
Input instruction hold after PSEN
0
0
ns
t_PXIZ(2) Input instruction float after PSEN
32
t_CLCL – 10 ns
t_PXAV(2) Address valid after PSEN
37
t_CLCL – 5
ns
t_AVIV
Address to valid instruction in
148
5t_CLCL – 60 ns
t_AZPL
Address float to PSEN
–10
–10
ns
Note: 1. Conditions (in addition to those in Table 110., page 133, V_CC = 3.0 to 3.6V): V_SS = 0V; C_L for Port 0, ALE and PSEN output is 100pF,
for 5V devices, and 50pF for 3V devices; C_L for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)
2. Interfacing the uPSD321x Devices to devices with float times up to 35ns is permissible. This limited bus contention does not cause
any damage to Port 0 drivers.
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