Motorola Mobility LLC T56KT1 User Manual

Page of 116
Controls and Indicators Interface
44
 G30 - Module Hardware Description
December 15, 2009
Reset
To reset the module, RESET_IN must be used (see 
). This pin performs an external 
reset, also called hardware reset. Driving the RESET_IN pin low causes an asynchronous reset of 
the entire device except for the Real Time Clock block (RTC). The device then enters its 
power-on reset sequence.
Note:
As an external reset input, it is recommended that RESET_IN signal will be connected 
via a push button, or an open-drain transistor, or an open-collector transistor. In this way, 
when RESET_IN signal is not used, It will be at High-Z state. In any case, it is forbidden 
to connect this signal directly to any input voltage level.
VREF Reference Regulator
The G30 incorporates a regulated voltage output, VREF. The regulator provides a 2.85V output 
for use by the customer application. This regulator can source up to 30 mA of current to power 
any external digital circuits.
33
34
GPIO4/SCL
O
I
2
C bus clock line
I
2
C interface
voltage domain.
PU drain.
Value at reset: T/OD.
I/O
GPIO
1
36
GPIO5
I/O
GPIO
Generic digital interfaces
voltage domain.
Output driver class F.
PU/PD class B.
2
38
GPIO6
I/O
GPIO
Generic digital interfaces
voltage domain.
Output driver class F.
PU/PD class B.
5
40
GPIO7
I/O
GPIO
Generic digital interfaces
voltage domain.
Output driver class F.
PU/PD class B.
6
42
GPIO8
I/O
GPIO
Generic digital interfaces
voltage domain.
Output driver class F.
PU/PD class B.
Table 2-19: Controls and Indicators (Cont.)
Pin #
(LGA 
interface)
Pin #
(70 pin 
connector 
interface)
G30
Signal Name
G30
I/O
Function
Remarks