EKK8011A ELAN Microelectronics Corp, EKK8011A Datasheet - Page 26

• Manufacturer Part Number: EKK8011A
• Description: Usb & Ps/2 Keyboard Encoder
• Manufacturer: ELAN Microelectronics Corp

eKK8011AB
USB & PS/2 Keyboard Encoder
22 • • • •
6.2.2 LED Report for USB Keyboard
When one of the LED buttons (Num, Caps, Scroll) is pressed, the host issues a Setup
package with a Set_Report request to Endpoint 0 and an Out package with 1 byte data,
which indicates the LED status. The format of the 1 byte data is:
6.2.3 USB Keyboard Scan Code
When the keys of HID Using Page 07 are pressed, the scan codes will be sent using
Endpoint 1. If the keys of HID Using Page 01 and 0C are pressed, the scan codes will
be sent using Endpoint 2.
When the host issues an IN packet to Endpoint 1 to receive data from the device and
the keys of HID Using Page 07 are pressed, the device return 8 bytes to the host. The
8 bytes as follows:
The modifier bytes are as follows:
When the host issues an IN packet to Endpoint 2 to receive data from the device and
the keys of HID Using Page 0C (or 01) are pressed, the device return 3 (or 2) bytes to
the host. The 3 (or 2) bytes are as follows:
Right GUI
Constant
Byte 7
Key 6
Bit 7
Bit 7
Using page (generic desktop): 0x05 0x01
Using (system control): 0x09 0x80
Collection (application): 0xa1 0x01
Report id (2): 0x85 0x02
Using minimum (81): 0x19 0x81
Using maximum (83): 0x29 0x83
Logical minimum (0): 0x15 0x00
Logic maximum (1): 0x25 0x01
Report size (1): 0x75 0x01
Report count (3): 0x95 0x03
Input (data, variable, absolute): 0x81 0x02
Report count (5): 0x95 0x05
Input (constant): 0x81 0x01
End collection: 0xc0
Constant
Right Alt
Byte 6
Key 5
Bit 6
Bit 6
Right Shift Right Ctrl
Constant
Byte 5
Key 4
Bit 5
Bit 5
Byte 4
Key 3
Kana
Bit 4
Bit 4
(This specification is subject to change without further notice)
Compose Scroll Lock Caps Lock Num Lock
Left GUI
Byte 3
Key 2
Bit 3
Bit 3
Product Specification (V1.4) 07.10.2006
Left Alt
Byte 2
Key 1
Bit 2
Bit 2
Reserved
Left Shift
Byte 1
Bit 1
Bit 1
Modifier
Left Ctrl
Byte 0
Bit 0
Bit 0