UPSD3422_06 Datasheet, PDF (270/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

DC and AC parameters
uPSD34xx
# of PFQCLK in
BUSCON Reg.
6
7
READ Cycle
n
m
4
5
5
6
WRITE Cycle
x
y
4
3
5
4
Figure 100. External WRITE cycle (80-pin device only)
ALE
tLHLL
RD
tLLWL
tWLWH
WR
tAVLL
MCU
AD0 - AD7
LATCHED
MCU
A8 - A15
tAVQV
tLLAX
A0-A7
tQVWH
DATA OUT
tAVWL
A8-A15
tWHLH
tWHQX
A0-A7
DATA IN
A8-A15
AI10472
Table 161. External WRITE cycle AC characteristics (3V or 5V device)
Symbol
Parameter
40MHz Oscillator⁽¹⁾
Variable Oscillator
1/t_CLCL = 3 to 40MHz _Unit
Min
Max
Min
Max
t_LHLL ALE pulse width
17
t_AVLL Address Setup to ALE
13
t_LLAX Address hold after ALE
7.5
t_WLWH WR pulse width⁽²⁾
40
t_LLWL ALE to WR
7.5
t_CLCL – 8
ns
t_CLCL – 12
ns
0.5t_CLCL –
5
ns
xt_CLCL – 10
ns
0.5t_CLCL –
5
ns
t_AVWL Address (A0-A7) valid to WR⁽³⁾
t_WHLH WR High to ALE High
t_QVWH Data setup before WR^(y)
t_WHQX Data hold after WR
32.5
9.5
20
9.5
t_AVQV
Address valid to Latched
Address out on Ports A and B
1.5t_CLCL –
5
ns
9.5
0.5t_CLCL – 0.5t_CLCL +
3
2
ns
14.5
yt_CLCL – 5
ns
0.5t_CLCL – 0.5t_CLCL +
3
2
ns
35.5 (3V)
1.5t_CLCL –
2
ns
28 (5V)
t_CLCL – 9.5 ns
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