Node Processor Interface Timing - Motorola MC68838 User Manual

11.4 AC ELECTRICAL CHARACTERISTICS
Minimum High-Level Input, CMOS
V out = 0.1 V or V CC – 0.1 V; I out = 20 µA; V CC = 4.5 V
V CC = 5.5 V
Minimum High-Level Input, TTL
V out = 0.1 V or V CC – 0.1 V; I out = 20 µA; V CC = 4.5 V
V CC = 5.5 V
Maximum Low-Level Input, CMOS
V out = 0.1 V or V CC – 0.1 V; I out = 20 µA; V CC = 4.5 V
V CC = 5.5 V
Maximum Low-Level Input, TTL
V out = 0.1 V or V CC – 0.1 V; I out = 20 µA; V CC = 4.5 V
V CC = 5.5 V
Minimum Low-Level Output Current, V OL = 0.4 V, V CC = 4.5 V
Minimum High-Level Output Current, V OH = 3.7 V, V CC = 4.5 V
Maximum Input Leakage Current, V
Maximum Output Leakage, Three-State, Output = High Z, V out = V CC or GND,
V CC = 5.5 V
Maximum Input Capacitance, V CC = 5.0 V
Maximum Output Capacitance, Output = High Z, V CC = 5.0 V
Maximum I/O Capacitance, Configured as Input, V CC = 5.0 V
NOTE: Voltages are referenced to GND. All AC timings assume a capacitive loading of ≤ 50 pF.

11.5 NODE PROCESSOR INTERFACE TIMING

Num
MACSEL Setup Time
1
2 MACSEL Hold Time
3 NPRW Setup Time
4 NPRW Hold Time
5 NPA Setup Time
6 NPA Hold Time
7 Time to NPD High Impedance
8 Time to NPD Driven (Read)
9 Time to NPD Valid (Read)
10 Time to NPD Invalid (Read)
11 NPD Setup Time (Write)
12 NPD Hold Time (Write)
Time to MACINT Asserted
13
Time to MACINT Negated
14
11-2
Characteristic
,
n = V CC or GND V CC = 5.5 V
i
Characteristic
MC68838 USER'S MANUAL
Symbol Min M a x
V IH
3.15 —
3.85 —
V IH
2.0 —
2.0 —
V IL
— 1.35
— 1.35
V IL
— 0.8
— 0.8
I OL 5.8 —
O HI –6.3 —
±.87
I in —
±4.4
I OZ —
C in — 10.0
C out — 12.5
C I/O — 15.0
(see Figure 11-1)
Min M a x
7 —
7 —
5 —
14 —
5 —
14 —
— 25
2 —
— 25
2 —
20 —
17 —
— 35
— 35
MOTOROLA
Unit
V
V
V
V
mA
mA
µA
µA
pF
pF
pF
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns