Cactus Technologies, Limited
3.1.1.
Optional Write Protect Function
For CFast cards with the optional Write Protect switch option, the Write Protect function can
be activated either by using the Write Protect switch or by pulling pin PC10 low. The current
Write Protect status of the card is indicated by pin PC8 as described below:
Pin name
Type
Description
PC8
Output
Write Protect Status; 'Low' : card is in WP
mode, 'High' : card is not in WP mode
PC10
Input
Enable/Disable Write Protect; '0' : enable
WP, '1' : disable WP. Note that this pin
function is active only if the WP switch is
not in the WP position.
3.2. Electrical Specifications
The following table defines all D.C. Characteristics for the CFast products. Unless otherwise
stated, conditions are:
Vcc = 3.3V ± 10%
Ta = -45°C to 90°C
3.2.1.
Absolute Maximum Ratings
Parameter
Symbol
MIN
MAX
Unit
s
Storage Temperature
Ts
-65
+150
o
C
Operating Temperature
T
A
-45
+90
o
C
Vcc with respect to GND
Vcc
-0.3
3.6
V
3.2.2.
DC Characteristics
Parameter
Symbol
MIN
MAX
Unit
s
Input Voltage
Vin
-0.5
Vcc + 0.5
V
Output Voltage
Vout
-0.3
Vcc + 0.3
V
Input Leakage Current
I
LI
-10
10
uA
Output Leakage Current
I
LO
-10
10
uA
Input/Output Capacitance
C
I
/C
o
10
pF
Cactus Technologies Limited
Industrial Grade CFast Card Product Manual
v1.1
12
