Universal Peripheral Interface User's Manual

UPI-C42/UPI-L42
AC CHARACTERISTICS
T
A
e
0
§
Cto
a
70
§
C, V
SS
e
0V, V
CC
e
V
DD
ea
5V
g
10%;
a
3.3V
g
10% for the UPI-L42 (Continued)
CLOCK
Symbol Parameter Min Max Units
t
CY
UPI-C42/UPI-L42 Cycle Time 1.2 9.20 ms
(1)
t
CYC
UPI-C42/UPI-L42 Clock Period 80 613 ns
t
PWH
Clock High Time 30 ns
t
PWL
Clock Low Time 30 ns
t
R
Clock Rise Time 10 ns
t
F
Clock Fall Time 10 ns
NOTE:
1. t
CY
e
15/f(XTAL)
AC CHARACTERISTICS DMA
Symbol Parameter Min Max Units
t
ACC
DACK to WR or RD 0 ns
t
CAC
RD or WR to DACK 0 ns
t
ACD
DACK to Data Valid 0 130 ns
t
CRQ
RD or WR to DRQ Cleared 110 ns
(1)
NOTE:
1. C
L
e
150 pF.
AC CHARACTERISTICS PORT 2
Symbol Parameter f(t
CY
)
(3)
Min Max Units
t
CP
Port Control Setup Before Falling Edge of PROG 1/15 t
CY
b
28 55 ns
(1)
t
PC
Port Control Hold After Falling Edge of PROG 1/10 t
CY
125 ns
(2)
t
PR
PROG to Time P2 Input Must Be Valid 8/15 t
CY
b
16 650 ns
(1)
t
PF
Input Data Hold Time 0 150 ns
(2)
t
DP
Output Data Setup Time 2/10 t
CY
250 ns
(1)
t
PD
Output Data Hold Time 1/10 t
CY
b
80 45 ns
(2)
t
PP
PROG Pulse Width 6/10 t
CY
750 ns
NOTES:
1. C
L
e
80 pF.
2. C
L
e
20 pF.
3. t
CY
e
1.25 ms.
18