User's Manual

A8000 User Guide
Confidential
A8000_User_Guide_V1.0 Page 15 of 22 2009/05/13
2.13 General Purpose Input Output (GPIO)
If needed, Many signal pins of function interfaces such as KEYPAD, LCD,UART and IIC can be
used as GPIO alternatively by software configuration, please refer to appendix table4-1 for
application.
3 Electrical Characteristics and Reliability
3.1 Absolute Maximum Ratings
Absolute maximum rating for power supply and voltage on digital and analog pins of A8000 are list
in table3-1 as follows.
Table3-1 Absolute maximum ratings
Parameter Min Max Unit
Peak current of power supply 0 3.0 A
Voltage at digit pins -0.3 3.3 V
Voltage at analog pins -0.3 3.0 V
Voltage at digit/analog pins in POWER DOWN mode -0.25 0.25 V
3.3 Power Supply Ratings
Table3-3: A8000 power supply ratings
Parameter Description Conditions Min Typ Max Unit
Supply voltage Voltage must stay within the
min/max values, including
voltage drop, ripple, and spikes.
3.5 4.0 4.2 V
VBAT
Voltage drop
during transmit
burst
Normal condition, power control
level for Pout max
400 mV
I
VBAT
Peak supply
current (during
transmission
slot every
4.6ms)
Power control level 2 3 A