Motorola M68HC08 Designer Reference Manual page 26

USB and PS/2 Multimedia Keyboard Interface
IN EPO HANDLER
SET NAK TO IN EP0
STATUS STAGE ?
ALL DATA
SENT?
USB Key Codes
ACPI Power
Management
Control
Designer Reference Manual
26
Freescale Semiconductor, Inc.
YES
NO [DATA STAGE]
YES
NO
PREPARE FOR
NEXT DATA STAGE
Figure 1-15. IN EPO HANDLER
The key codes or usage IDs for a basic 104 keyboard are defined in the
USB HID Usage Tables. In addition to the basic key codes, Microsoft has
published standards for the Windows keys, Power Management keys
(sleep, wake, and power), and the audio control keys.
Table 1-7. Consumer Page HID Controls in Windows ME and 2000
USAGE
$81
$82
$83
USB and PS/2 Multimedia Keyboard Interface
For More Information On This Product,
Go to: www.freescale.com
SET STALL TO EP0 OUT
(CONTROL TRANSFER
COMPLETED)
PREPARE FOR
OUT STAGE
USAGE NAME
Power
Sleep
Wake
RETURN
DATA TYPE
Relative
Relative
Relative
DRM014 — Rev 0
MOTOROLA