GPCE2048B datasheet(13/24 Pages) GENERALPLUS

13 / 24 page

GPCE20XXB

Proprietary & Confidential

Apr. 13, 2015

Version: 1.2

6.12 Soft Reset Protection

Software reset.

Writes $5555 into P_System_Reset will reset

the whole system like hardware reset (pull low RESETB pin),

except a flag will set on in P_System_LVD_Ctrl(R/W).

6.13 ADC (Analog to Digital Converter) / DAC

The GPCE20XXB has eight channels 12-bit ADC (Analog to

Digital Converter).

The function of an ADC is to convert analog

signal to digital signal, e.g. a voltage level into a digital word.

The four channels of ADC can be four channels of line-in from

IOB [3:0] or one channel microphone (MIC) input through

amplifier PGA controller, and AGC controller.

The MIC amplifier

circuit is capable of reducing common mode noise by transmitting

signals through differential MIC Inputs (MICN, MICP).

Moreover,

an external resistor can be applied to adjust microphone gain and

time of AGC operating.

The AD needs to select source of line-in

before conversion.

The ADC take pad (VDD_ADC) as voltage

reference.

6.14 SPI

Serial

Peripheral

Interface

(SPI)

controller

built

GPCE20XXB to facilitate communicating with other devices and

components.

There are four control signals on SPI - SPICS

(IOA12), SPICK (IOA13), SDO (IOA14), and SDI (IOA15).

6.15 Audio Algorithm

The following speech types can be used in GPCE20XXB: PCM,

SACM_S200,

SACM_S480,

SACM_S530,

SACM_A1600,

SACM_A1601, SACM_A1800, SACM_A3400pro, SACM_A3600,

SACM_DVR520,

SACM_DVR1600,

SACM_DVR1800,

SACM_DVR3200, and SACM_DVR4800.

For melody synthesis,

the GPCE20XXB supports SACM_MS01 (FM) and SACM_MS02

(wave-table) synthesizers.

GPCE2048B Datasheet(PDF) 13 Page - Generalplus Technology Inc.

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