WM8955LUCD401 | Sharp SGH-T519 guide

Circuit Description

●Timing and control unit

●RF serial interface

●Low-power sleep mode controller

●Baseband Transmitter / Receiver

●Voice input and output

2.WM8955L(UCD401)

==> The WM8955L is a low power, high quality stereo DAC with intergrated headphone and loudspwaker amplifiers, designed to reduce external component requirements in portable digital audio application.

The on-chip headsphone amplifiers can deliver 40mW into a 16Ω load. Advanced on-chip digital signal processing performs bass and treble tone comtrol.

The WM8955L can operate as a master or a slave, and include an on-chip PLL. It can use most master clock frequencies commonly found in portable systems, including USB,GSM, CDMA or PDC clocks, or standard 256fs, clock rates. Different audio sample rates such as 48khz, 44.1khz, 8khz and many other are supported.

The WM8955L operates on supply voltages from 1.8V up to 3.6V, although the digital core can operates on a separate supply down to 1.42V, saving power. Different section of the chip can also be powered down under software control.

3. HPE(UCP201)

==> The Trident-HPE digital baseband processor is a complete system IC designed for

wireless terminals that includes two digital signal processor(DSP) cores optimized for low-power communications applications and a powerful, highperformance,

industry-standard microcontroller core along with a rich set of peripherals.

The Trident-HPE digital baseband processor achieves best-in-class signal processing performance while maintaining the efficient software code density, low power consumption, and small physical size required for GSM/GPRS terminals

ARM946E-S microcontroller core;

● 101 MHz system bus, 16 kbyte instruction and 16kbyte data caches.

● 8 kbyte tightly coupled zero wait-state instruction and 4kbyte tightly coupled zero wait- state data memory

● direct memory access controller for transparent transfer between memory and peripherals.

● External Memory interface with asynchronous burst mode support 5-3

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