Service Manual Baseband Section
7
When the Volume Switch is on, PWR-SW- and POWER-SW+ are at high level, and the radio powers
up. After power-on, POWER-CTL goes to high level, and POWER-KEY-DET goes to low level. During
power-off, POWER-SW+ is at low level, while POWER-KEY-DET is at high level. The system detects
power-off procedure via POWER-KEY-DET and implements the power-off procedure. Then
POWER-KEY-DET and POWER-SW+ go to low level, and the power is cut off.
3.1.3 Power Protection
Power protection includes over-current, reverse-voltage and ESD protection.
3.1.4 Power Consumption Control
OMAP can control and configure the power supply and working mode of the peripheral modules (RF
section and baseband section) via the I/O interface and serial bus, so as to reduce power
consumption.
3.2 Control Section
3.2.1
OMAP5912 Dual-core Processor
The radio uses the dual-core processor OMAP5912, which is mainly composed of ARM926EJ-S and
TMS320C55xx. ARM926EJ-S is the main controller, while TMS320C55xx is used for
modulation/demodulation and voice encoding/decoding.
To Next Page
Loading...
