User's Manual

Smart Machine Smart Decision
- 5 -
I
IH
High-level input current 2.1 - 3.1 V
I
IL
Low-level input current -0.3 - 0.7 V
V
OH
High-level input voltage 2.4 2.8 - V
V
OL
Low-level input voltage - - 0.4 V
* These parameters are for digital interface pins, such as keypad, GPIO, I
2
C, UART, PWMs and PCM.
3.3. SIM Card Interface Characteristics
Table 3: SIM card interface characteristics
Symbol Parameter Min Typ Max Unit
I
IH
High-level input current -1 - 1 uA
I
IL
Low-level input current -1 - 1 uA
1.4 - - V
V
IH
High-level input voltage
2.4 - - V
- - 0.27 V
V
IL
Low-level input voltage
0.4 V
1.62 - - V
V
OH
High-level output voltage
2.7 - - V
- - 0.36 V
V
OL
Low-level output voltage
- - 0.4 V
3.4. SIM_VDD Characteristics
Table 4: SIM_VDD characteristics
Symbol Parameter Min Typ Max Unit
3.0 V
V
O
Output voltage
1.8 V
I
O
Output current - - 10 mA
3.5. VRTC Characteristics
Table 5: VRTC characteristics
Symbol Parameter Min Typ Max Unit
V
RTC-IN
VRTC input voltage 1.2 2.8 3.0 V
I
RTC-IN
VRTC input current - 3.0 5.0- uA
V
RTC-OUT
VRTC output voltage - 2.8 - V
I
RTC-OUT
VRTC output current - 2 mA