CWA 16926-9:2022

Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 9: Text Terminal Unit Device Class Interface - Programmer's Reference CWA 16926-9:2022

General information

60.60 Standard published   Dec 21, 2022


CEN/WS XFS eXtensions for Financial Services

CEN/CENELEC Workshop Agreement

35.200   Interface and interconnection equipment | 35.240.15   Identification cards. Chip cards. Biometrics | 35.240.40   IT applications in banking


This specification describes the functionality of the services provided by text terminal unit (TTU) services under XFS, by defining the service-specific commands that can be issued, using the WFSGetInfo, WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions.
This section describes the functions provided by a generic Text Terminal Unit (TTU) service. A Text Terminal Unit is a text i/o device, which applies both to ATM operator panels and to displays incorporated in devices such as PIN pads and printers. This service allows for the following categories of functions:
• Forms oriented input and output
• Direct display output
• Keyboard input
• LED settings and control
All position indexes are zero based, where column zero, row zero is the top-leftmost position.

Life cycle


CWA 16926-9:2020


CWA 16926-9:2022
60.60 Standard published
Dec 21, 2022