Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 513)

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W90P710CD/W90P710CDG

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BITS DESCRIPTIONS

[3:1] Reserved

[0]

RX_IRQ

This Receive Interrupt bit indicates software that Host

controller receives one byte data from device. This data is

stored at PS2_SCANCODE register. Software needs to write

one to this bit to clear this interrupt after reading receiving

data in RX_SCAN_CODE register. Note that the reception of

the Extend (0xE0) and Release (0xF0) scan code will not

cause an interrupt by host. The case of the shift key codes

will be determined by the TRAP_SHIFT bit of PS2_CMD

PS2 Host Controller RX Scan Code Register (PS2_SCANCODE)

PS2SCANCODE 0xFFFF_9008 R/W key pad c RX Scan Code

0x0000_0000

31 30 29 28 27 26 25 24

RESERVED

23 22 21 20 19 18 17 16

RESERVED

15 14 13 12 11 10 9 8

RESERVED

RX_shift_key

X_release

X_extend

7 6 5 4 3 2 1 0

RX_SCAN_CODE

BITS DESCRIPTIONS

[31:11] RESERVED -

[10] RX_shift_key

This Receive Shift Key bit indicates that left or right shift key on

the keyboard is hold. This bit is read only and will clear by host

when the release shift key codes are received.

[9] RX_release

Receive Released Byte

When one key has been released, the keyboard will send F0

(hex) to inform Host controller. This bit indicates software that

Host controller receives release byte (F0). This bit is read only

and will update when host has received next data byte.

1 2 ... 508 509 510 511 512 513 514 515 516 517 518 ... 551 552

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 513

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