UPSD3422_06 Datasheet, PDF (269/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

uPSD34xx
DC and AC parameters
Figure 99. External READ cycle (80-pin device only)
tLHLL
tLLRL
ALE
RD
tAVLL
tLLAX
MCU
AD0 - AD7
LATCHED
MCU
A8 - A15
A0-A7
tRLRH
tAZRL
tAVQV
tAVDV
DATA
IN
tRXDZ
tRXDX
A8-A15
A0-A7
A8-A15
AI10471
Table 159. External READ 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
t_AVLL
ALE pulse width
Address setup to ALE
t_LLAX Address hold after ALE
t_LLRL
t_RLRH
t_RXIX
ALE to RD
RD pulse width⁽²⁾
Input data hold after RD
t_RHIZ
t_AVDX
t_AZRL
Input data float after RD
Address to valid data in⁽²⁾
Address float to RD
t_AVQV
Address valid to latched
address out on Ports A and B
17
t_CLCL – 8
ns
13
t_CLCL – 12
ns
7.5
0.5t_CLCL –
5
ns
7.5
0.5t_CLCL –
5
ns
40
nt_CLCL – 10
ns
2
2
ns
10.5
0.5t_CLCL –
2
ns
70
mt_CLCL – 5 ns
–2
–2
ns
35.5 (3V)
1.5t_CLCL –
2
ns
28 (5V)
t_CLCL – 9.5 ns
Note: 1 BUSCON Register is configured for 4 PFQCLK.
2 Refer to Table 160 for “n” and “m” values.
Table 160. n, m, and x, y values
# of PFQCLK in
BUSCON Reg.
READ Cycle
n
m
4
2
3
5
3
4
WRITE Cycle
x
y
2
1
3
2
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