UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 152

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Table 114. External Program Memory AC Characteristics (with the 3V MCU Module)
Note: 1. Conditions (in addition to those in Table 109, V
Table 115. External Clock Drive (with the 5V MCU Module)
Note: 1. Conditions (in addition to those in Table 108, V
Table 116. External Clock Drive (with the 3V MCU Module)
Note: 1. Conditions (in addition to those in Table 109, V
152/175
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
Symbol
Symbol
LHLL
AVLL
LLAX
LLIV
LLPL
PLPH
PLIV
PXIX
PXIZ
PXAV
AVIV
AZPL
RLRH
WLWH
LLAX2
RHDX
RHDX
RLRH
WLWH
LLAX2
RHDX
RHDX
(2)
2. Interfacing the uPSD325X devices to devices with float times up to 35ns is permissible. This limited bus contention does not cause
(2)
devices, and 50pF for 3V devices; C
any damage to Port 0 drivers.
other outputs is 80pF
devices, and 50pF for 3V devices; C
ALE pulse width
Address set-up to ALE
Address hold after ALE
ALE Low to valid instruction in
ALE to PSEN
PSEN pulse width
PSEN to valid instruction in
Input instruction hold after PSEN
Input instruction float after PSEN
Address valid after PSEN
Address to valid instruction in
Address float to PSEN
Oscillator period
High time
Low time
Rise time
Fall time
Oscillator period
High time
Low time
Rise time
Fall time
Parameter
Parameter
Parameter
(1)
(1)
(1)
L
L
for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)
for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)
CC
CC
CC
= 3.0 to 3.6V): V
= 3.0 to 3.6V): V
= 4.5 to 5.5V): V
Min
Min
Min
–10
24MHz Oscillator
40MHz Oscillator
24MHz Oscillator
43
17
17
22
95
37
0
SS
SS
SS
= 0V; C
= 0V; C
= 0V; C
Max
Max
Max
148
80
60
32
L
L
L
for Port 0, ALE and PSEN output is 100pF, for 5V
for Port 0, ALE and PSEN output is 100pF; C
for Port 0, ALE and PSEN output is 100pF, for 5V
2t
3t
t
t
t
CLCL
CLCL
CLCL
t
CLCL
CLCL
CLCL
1/t
1/t
1/t
Variable Oscillator
Variable Oscillator
Variable Oscillator
41.7
Min
Min
Min
–10
CLCL
25
10
10
12
12
CLCL
0
CLCL
– 25
– 25
– 20
– 40
– 30
– 5
= 24 to 40MHz
= 8 to 24MHz
= 8 to 24MHz
t
t
t
t
CLCL
CLCL
CLCL
CLCL
4t
3t
5t
t
CLCL
CLCL
CLCL
CLCL
Max
Max
41.7
Max
125
10
10
12
12
– t
– t
– t
– t
– 10
– 87
– 65
– 60
CLCX
CLCX
CLCX
CLCX
Unit
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
L
for