Rabbit RabbitCore RCM2200, Руководство пользователя

Страница: 62 / 91

56 RabbitCore RCM2200
Table A-3 lists the parameters shown in these figures and provides minimum or measured
values.
A.3 Rabbit 2000 DC Characteristics
Table A-4 outlines the DC characteristics for the Rabbit 2000 at 5.0 V over the recom-
mended operating temperature range from T
a
= –40°C to +85°C, V
DD
= 4.5 V to 5.5 V.
Table A-3. Memory and External I/O Read/Write Parameters
Parameter Description Value
R
ead Parameter
s
T
adr
Time from CPU clock rising
edge to address valid
Max.
7 ns @ 20 pF, 5 V
14 ns @ 70 pF, 5 V
T
setup
Data read setup time Min. 2 ns @ 5 V
T
hold
Data read hold time Min. 0 ns
W
rite Param
eters
T
adr
Time from CPU clock rising
edge to address valid
Max.
7 ns @ 20 pF, 5 V
14 ns @ 70 pF, 5 V
T
hold
Data write hold time from /WEx
or /IOWR
Min. ½ CPU clock cycle
Table A-4. 5.0 Volt DC Characteristics
Symbol Parameter Test Conditions Min Typ Max Units
I
IH
Input Leakage High
V
IN
= V
DD
, V
DD
= 5.5 V
10 µA
I
IL
Input Leakage Low
(no pull-up)
V
IN
= V
SS
, V
DD
= 5.5 V
-10 µA
I
OZ
Output Leakage (no pull-up)
V
IN
= V
DD
or V
SS
,
V
DD
= 5.5 V
-10 10 µA
V
IL
CMOS Input Low Voltage
0.3 x V
DD
V
V
IH
CMOS Input High Voltage
0.7 x V
DD
V
V
T
CMOS Switching Threshold V
DD
= 5.0 V, 25°C
2.4 V
V
OL
CMOS Output Low Voltage
I
OL
= See Table A-5
(sinking)
V
DD
= 4.5 V
0.2 0.4 V
V
OH
CMOS Output High Voltage
I
OH
= See Table A-5
(sourcing)
V
DD
= 4.5 V
0.7 x V
DD
4.2 V