M
ODEL
SL900A V
ERSION
V_1.0
P
REPARED BY
H/W
D
ATE
2006.06.30
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
22/51
SL900A
T
ECHNICAL
M
ANUAL
4.8
Read Time Clock
The Real Time Clock(RTC) module provides time and data information. The clock is based on a 32.768Khz
oscillator with an independent power supply. When the mobile handset is powered off, a dedicated regulator
supplies the RTC block. If the main battery is not present, a backup supply such as a small mercury cell battery
or a large capacitor is used. In addition to providing timing data, an alarm interrupt is generated and can be used
to power up the baseband core via the BBWAKEUP pin. Regulator interrupts corresponding to seconds, minutes,
hours and days can be generated whenever the time counter value reaches a maximum value. The Maximum
day-of-month values, which depend on the leap year condition, are stored in the RTC block.
In SL900A
, Big Capacitor Battery(BAT100) is used for Backup Battery. The Charging Voltage is about 1.5V
by VRTC.
4.9
Auxiliary ADC Unit
The auxiliary ADC unit is used to monitor the status of battery and charger, identify the plugged peripheral and
perform temperature measurement. There provides 7 input channels for diversified application in this unit. There
provides 2 modes of operation : immediate mode and timer-triggered mode.
5.
Microcontroller Coprocessors
Microcontroller Coprocessors are designed to run computing-intensive processes in place of the
Microcontroller(MCU). These coprocessors especially target timing critical GSM/GPRS Model processes
that require fast response and large data movement. Controls to the coprocessors are all through memory
access via the APB.
6.
Multi-Media Subsystem
MT6226M is specially designed to support multi-media terminals. It integrates several hardware based
accelerators such as advanced LCD display controller, hardware JPEG encoder/decover, hardware Image
Resizer, and MPEG4 video Codec.
In addition, MT6226M also incorporates nand Flash, USB 1.1 Device and SD/MMC/MS/MS Pro
Controllers for mass data transfers and storages. This chapter descripbes those functional bocks in more
details.
6.1
LCD Interface
MT6226M contains a versatile LCD controller which is optimized for multimedia applications. This
controller supports many types of LCD modules and contains a rich feature set to enhance the functionality.
These features are :
-
Up to 320x240 resolution
-
The internal frame buffer supports 8bpp indexed color and RGB 565 format
-
Supports 8bpp(RGB332), 12bpp(RGB444), 16bpp(RGB5650, 18bit(RGB666) and 24bit(RGB888) LCD
modules
Summary of Contents for SL900A
Page 1: ...SL900A SL900A ...
