Rainbow Electronics T89C5121 - Manual (Page 104)

104
A/T8xC5121
4164G–SCR–07/06
Table 82. Smart Card RST, CC4, CC8, DC Parameters (Port P1.5, P1.3, P1.1)
Note: 1. The voltage on RST should remain between -0.3V and C V
CC
+ 0.3V during dynamic
operation.
Table 83. Alternate Card RST DC Parameters (Port P3.7) : 5V tolerant
Note: 1. The voltage on RST should remain between -0.3V and D V
CC
+ 0.3V during dynamic
operation.
Table 84. Card Presence DC Parameters (P1.2)
Symbol Parameter Min Typ Max Unit Test Conditions
V
OL
Output Low Voltage
0(1)
0(1)
0.12 x
CV
CC
0.4
V
I
OL
= 20 μΑ
I
OL
= 50 μΑ
I
OL
Output Low Current 15 mA
V
OH
Output High Voltage
CV
CC
- 0.5
0.8 x CV
CC
CV
CC
CV
CC
(1)
V I
OH
= 50 μΑ
I
OH
= 20 μΑ
I
OH
Output High Current 15 mA
t
R
t
F
Rise and Fall delays 0.8 μ s C
IN
= 30 pF
Voltage stability
-0.25
CV
CC
-0.5
0.4 x CV
CC
CV
CC
+
0.25
Low level
High level
Symbol Parameter Min Typ Max Unit Test Conditions
V
OL
Output Low Voltage 0 (1) 0.2 x DV
CC
V I
OL
= 200 μΑ
V
OH
Output High Voltage
0.8 x DV
CC
0.8 x DV
CC
DV
CC
(1)
DV
CC
V
I
OH
= 20 μΑ ( 1.8V)
I
OH
= 200 μΑ ( 3V)
t
R
t
F
Rise and Fall delays 400 μ s C
IN
= 30 pF
Symbol Parameter Min Typ Max Unit Test Conditions
I
OL1
CPRES weak pull-
up output current
3 10 25 μ A
P1.2 = 1, short to V
SS
(internal pull-up enabled)