Editing Kroy 360 (section)

==Interfacing==

The Kroy 360 keyboard unit is connected to the the printer unit via flat coiled cable with 8P8C module jacks. This connection is used to provide power from the printer to the keyboard and transfer label print information from the keyboard to the printer. This connection can not be used to determine what keys have been pressed. In order to interface the keyboard on a per key basis, the internal header on the keyboard pcb must be used.

The keyboard unit can be used in a standalone configuration by supplying 5V via the DC barrel jack on the rear panel. The size of the barrel is 6.3 mm OD x 2.5 mm ID but the more standard 5.5 mm OD x 2.5 mm ID size will work. Note: The polarity of the power jack is ''center negative'' while most commonly available wall-wart style power supplies are ''center positive''.

The keyboard unit contains a keyboard assembly and a main board. The two are connected with a 20 pin ribbon cable using female 2x10 connectors with 2.54mm pitch. The pinout of this connection is the same on both the mainboard and keyboard.

====Pinout====

:{| class="wikitable"
! scope="col" |Pin
! scope="col" |Function
! scope="col" |Pin
! scope="col" |Function
|-
|1
|DR - Data Ready
|2
|CT - Continue (from host)
|-
|3
|KS - Key State (Down = High)
|4
|Edit Mode LED (Active Low)
|-
|5
|D6
|6
|Type Specs LED (Active Low)
|-
|7
|D5
|8
|Caps Lock LED (Active Low)
|-
|9
|D4
|10
|GND
|-
|11
|D3
|12
|GND
|-
|13
|D2
|14
|GND
|-
|15
|D1
|16
|GND
|-
|17
|D0
|18
|Unused
|-
|19
|5V
|20
|5V
|}

====Timing Diagram====
[[File:Kroy-360-press-release-timing.svg|600px]]

Key scan codes are sent as a 7 bit, parallel value on data lines D0 through D6.
 
When a key is pressed, Key State(KS) will transition from low to high and Data Ready(DR) will pulse low. The host issues a Continue(CT) with a low pulse to acknowledges data reception. Note: if the Continue pulse is sent too soon after the Data Ready pulse is received or the pulse is too short, the keyboard may miss it. A delay of 100us and a pulse width of 20us has been used succesfully.

When a key is released, Key State will transition from high to low and DR/CT handshake will repeat. Data Ready can be used to latch/read data from data lines D0 through D6.

Note: Key State (Pin 3) tracks the last key event and is common to all keys.

====Scan codes====
The scan codes generated by the keyboard via the 20 pin header are shown in the diagram below:

[[File:Kroy-360-scan-codes.jpg|800px]]