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GPCE4XXXX Datasheet(PDF) 30 Page - Generalplus Technology Inc. |
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GPCE4XXXX Datasheet(HTML) 30 Page - Generalplus Technology Inc. |
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30 / 49 page  GPCE4XXXX © Generalplus Technology Inc. Proprietary & Confidential 30 Jun. 26, 2017 Version: 1.1 7.9.1 IO PWM One IO PWMs which duty is selected from 1/256 to 254/256. These PWM signals can be applied for controlling the speed of motor or other device. 7.9.2 Timebase Timebase, generated by 32768Hz crystal oscillator, is a combination of frequency selection, generating 4KHz, 2KHz, 512Hz, 64Hz, 16Hz and 2Hz interrupt sources (FIQ6/IRQ6, FIQ7/IRQ7) for real-time-clock. 7.10 Capacitance Touch Sensor(CTS) and CTS Timers GPCE4xxxx provides Capacitive Touch sensor. It is able to perform capacitive sensing, decision making, responsive actions and other duties pertinent to the system as well. 7.11 Sleep Mode, Wakeup, Halt Mode, and Watchdog 7.11.1 Sleep and wakeup modes 1) Sleep, Halt: After power-on reset, IC starts running until a sleep command is issued. When a sleep command is accepted, IC will turn the system clock (PLL) off. It enters sleep mode if 32KHz Sleep Status bit is cleared or enters halt mode if 32KHz Sleep Status bit is set. 2) Wakeup: CPU awaking from sleep mode requires a wakeup signal to turn the system clock (PLL) on. The 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) / DAC The GPCE4xxxx 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] 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 operating time of AGC. 7.13 USB Device Function (by body) Some of the GPCE4xxxx series provide device function which is compatible with USB 2.0 full-speed standard. An USB transceiver is also built-in. 7.14 SPIFC A Serial Peripheral Interface flash controller (SPIFC) is featured to facilitate communication between GPCE4xxxx 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). 7.14.1 SPI2 A Serial Peripheral Interface controller (SPI2) is built in GPCE4xxxx to facilitate communicating with other devices and components. There are four control signals on SPI2 - SPICS (IOB12), SPICK (IOB13), SDI (IOB14), and SDO (IOB15). D7 D6 D4 D5 D2 D3 D0 D1 D7 D6 D5 D3 D4 D2 D0 D1 SPICK(POL=0) SPICK(POL=1) SDO SDI SPICS PHASE = 0 |
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