參數(shù)資料
型號: uPSD3253AV-24T1T
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core
中文描述: 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核
文件頁數(shù): 151/175頁
文件大?。?/td> 1731K
代理商: UPSD3253AV-24T1T
151/175
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Figure 75. External Program Memory READ Cycle
Table 113. External Program Memory AC Characteristics (with the 5V MCU Module)
Note: 1. Conditions (in addition to those in Table 108, V
CC
= 4.5 to 5.5V): V
SS
= 0V; C
L
for Port 0, ALE and PSEN output is 100pF; C
L
for
other outputs is 80pF
2. Interfacing the uPSD325X devices to devices with float times up to 20ns is permissible. This limited bus contention does not cause
any damage to Port 0 drivers.
Symbol
Parameter
(1)
40MHz Oscillator
Variable Oscillator
1/t
CLCL
= 24 to 40MHz
Unit
Min
Max
Min
Max
t
LHLL
ALE pulse width
35
2t
CLCL
– 15
ns
t
AVLL
Address set-up to ALE
10
t
CLCL
– 15
ns
t
LLAX
Address hold after ALE
10
t
CLCL
– 15
ns
t
LLIV
ALE Low to valid instruction in
55
4t
CLCL
– 45
ns
t
LLPL
ALE to PSEN
10
t
CLCL
– 15
ns
t
PLPH
PSEN pulse width
60
3t
CLCL
– 15
ns
t
PLIV
PSEN to valid instruction in
30
3t
CLCL
– 45
ns
t
PXIX
Input instruction hold after PSEN
0
0
ns
t
PXIZ(2)
Input instruction float after PSEN
15
t
CLCL
– 10
ns
t
PXAV(2)
Address valid after PSEN
20
t
CLCL
– 5
ns
t
AVIV
Address to valid instruction in
70
5t
CLCL
– 55
ns
t
AZPL
Address float to PSEN
–5
–5
ns
tAVLL
tPLPH
tPXIZ
tAVIV
PSEN
PORT 2
PORT 0
AI06848
tLHLL
ALE
tLLPL
A0-A7
tLLAX
tAZPL
tLLIV
tPLIV
A0-A7
tPXAV
tPXIX
A8-A11
INSTR
IN
A8-A11
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