Technical data

ManualsBrandsQ-Waves ManualsAdapterWireless USB Audio/Video Adapter Set

SEND SELF TEST

FAIL CODE ($FC)

SEND SELF TEST PASS

CODE ($AA)

PS/2 INITIALIZATION

SELF

40ms TIMER TICK ?

YES

KEYS PRESSED

TEST PASS ?

SCAN KEY MATRIX

YES

SEND MAKE CODES

NO

YES

STOP

OR RELEASED

FOR KEYS PRESSED

SEND BREAK CODES

FOR KEYS RELEASED

ACK AND

VALID COMMAND

FROM HOST ?

HANDLE COMMAND

NO

YES

GHOST KEY ?

NO

NO

YES

SEND SELF TEST PASS

CODE ($AA)

SEND SELF TEST

FAIL CODE ($FC)

Firmware Description

USB and PS/2 Multimedia Keyboard Interface, Rev. 1

Freescale Semiconductor 13

Figure 1-8. PS/2 Main Routine