M
ODEL
SL599 V
ERSION
V_1.0
P
REPARED BY
H/W
D
ATE
2007.04.11
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
38/52
SL599
T
ECHNICAL
M
ANUAL
12.
Analog Front-End & Analog Blocks
To communicate with Analog blocks, a common control interface for all Analog blocks is implemented. In
addition, there are some dedicated interfaces for data transfer. The common control interface translates APB
bus write and read cycle for specific addresses related to Analog front-end control. Dedicated data interface
of each Analog block is implemented in the corresponding digital block. The Analog blocks includes the
following Analog function for complete GSM/GPRS base-band signal processing :
II. MT6305BN ( GSM Power Management System)
The MT6305BN is a power management system chip optimized for GSM handsets, especially those
based on the MTK system solution. It contains seven LDOs, one to power each of the critical GSM
sub-blocks. Sophisticated controls are available for power-up during battery charging, keypad
interface, and RTC alarm. The interface Features are listed below.
-
Handles all GSM baseband Power management
-
2.8V to 5.5V input range
-
Charger input up to 15V
-
Seven LDOs Optimized for specific GSM Subsystems
-
High Operation Efficiency and Low Stand-by Current
-
Li-Ion and NiMH battery Charge function
-
SIM Card interface
-
Three Open-Drain Output Switches to Control the LED, Alerter and vibrator
-
Thermal Overload Protection
-
Under Voltage Lock-Out Protection
-
Over Voltage Protection
-
Power on Reset And start up Timer
