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NUC140-LD3N Fiches technique(PDF) 74 Page - Nuvoton Technology Corporation |
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NUC140-LD3N Fiches technique(HTML) 74 Page - Nuvoton Technology Corporation |
74 / 97 page NuMicro NUC230/240 Datasheet Dec. 30, 2014 Page 74 of 97 Revision 1.01 6.15 PS/2 Device Controller (PS2D) 6.15.1 Overview 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 PS2_CLK and PS2_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 PS2_CLK signal after receiving a “Request to Send” state, but host has ultimate control over communication. Data of PS2_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. 6.15.2 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 |
Numéro de pièce similaire - NUC140-LD3N |
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Description similaire - NUC140-LD3N |
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