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NUC220-VA3E Datasheet(Fiches technique) 81 Page - Nuvoton Technology Corporation

Numéro de pièce NUC220-VA3E
Description  ARM® Cortex®-M 32-bit Microcontroller
Télécharger  107 Pages
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Fabricant  NUVOTON [Nuvoton Technology Corporation]
Site Internet  http://www.nuvoton.com
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 81 page
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NUC100/120xxxDN
Aug 31, 2015
Page 81 of 107
Rev 1.01
PS/2 Device Controller (PS2D)
6.16
6.16.1
Overview
The PS/2 device controller provides a basic timing control for PS/2 communication. All
communication between the device and the host is managed through the CLK and DATA pins.
Unlike PS/2 keyboard or mouse device controller, the receive/transmit code needs to be
translated as meaningful code by firmware. The device controller generates the CLK signal after
receiving a
“Request to Send” state, but host has ultimate control over communication. Data of
DATA line sent from the host to the device is read on the rising edge and sent from the device to
the host is change after rising edge. A 16 bytes FIFO is used to reduce CPU intervention.
Software can select 1 to 16 bytes for a continuous transmission.
6.16.2
Features
Host communication inhibit and Request to Send state detection
Reception frame error detection
Programmable 1 to 16 bytes transmit buffer to reduce CPU intervention
Double buffer for data reception
Software override bus




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