GPF8F datasheet(11/24 Pages) GENERALPLUS

11 / 24 page

GPF8F Series

Proprietary & Confidential

Aug. 03, 2018

Version: 1.1

FIQ/IRQ signal makes CPU to complete the

wakeup process and initialization.

The CPU

wakeup source is given in the following table.

Wakeup up source include all FIQ source and all

interrupt source.

7.11.2 Watchdog Reset

If the watchdog function is enabled, a reset signal is generated to

reset system when watchdog counter is overflow.

7.12 ADC (Analog to Digital Converter)

7.12.1 ADC for Line-in

The GPF8F has eight channels 12-bit ADC (Analog to Digital

Converter) to convert analog signal to digital signal.

The eight

channels of ADC can be eight channels of line-in from IOB [7:0].

7.12.2

ADC for microphone-in

Codec 16-bit ADC for microphone amplifier and digital AGC

circuit included.

7.13 SPU and Software Channel

The GPF8F uses a high performance SPU voice engine to

archive 8-channel voice with ADPCM/PCM code.

The SPU also

supports automatic zero-crossing concatenating function.

hardware multiplier is also embedded in this SPU for software

usage.

The fixed addresses of RAM area $0000 - $008A is

designed as address pointers and a data buffer for the 8-channel

speech/ melody generation.

Moreover, two 14-bit software

channels with noise filter are also supported.

There is one

14-bit DAC with push-pull amplifier for direct audio output.

7.14 UART Interface

The

UART/

IrDA

module

built

GPF8F

performs

serial-to-parallel conversion on data received from an external

device and it also performs parallel-to-serial conversion on data

transmitted to the external device.

7.15 SPIFC

A Serial Peripheral Interface FLASH controller (SPIFC) is built in

GPF8F to facilitate communicating with other devices and

components, especially for SPI FLASH.

The SPIFC supports

one-I/O, two-I/O, four-I/O mode of SPI FLASH.

The SPIFC also

supports auto mode which can access SPI FLASH data directly,

therefore user

’s program can be placed at external SPI FLASH.

There are six control signals on SPI - SPICS (IOA12), SPICK

(IOA13), SDI (IOA14), SDO (IOA15), SPIIO3 (IOA10, only for 4

I/O mode), and SPIIO2 (IOA11, only for 4 I/O mode).

7.15.1 SPI2

A Serial Peripheral Interface controller (SPI2) is built in GPF8F to

facilitate communicating with other devices and components.

There are four control signals on SPI2 - SPICS (IOB12), SPICK

(IOB13), SDI (IOB14), and SDO (IOB15).

SPICK(POL=0)

SPICK(POL=1)

SDO

SDI

SPICS

PHASE = 0

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