Fabricante
South African Micro Electronic Systems
Scope
This application note describes a simple interface for keyboard entry to the SA253x family via a Microcontroller. It also includes hardware description , flowchart and a software example based on the 80Cxx - family of Microcontrollers.
KEY FEATUREs
• only 5 outputs and 1 input required from µC for handshake to access all keys in the SA253x keyboard matrix
• universal interface, not restricted to specific Microcontrollers
• supports both 3V- and 5V- µCs
• same hardware for all single chip telephones : SA2531/2
• same software for all single chip telephones, only key labels must be replaced
Número de pieza
componentes Descripción
PDF
Fabricante
SINGLE CHIP TELEPHONE FOR INDIA
South African Micro Electronic Systems
VERSATILE SINGLE CHIP TELEPHONE
South African Micro Electronic Systems
Interface Connectors for Cellular Telephone
Mitsumi
Interface Connectors for Cellular Telephone
Mitsumi
PROGRAMMABLE KEYBOARD INTERFACE
Intel
PROGRAMMABLE KEYBOARD / DISPLAY INTERFACE
Intel
ONE MEMORY SINGLE CHIP TELEPHONE
South African Micro Electronic Systems
SINGLE CHIP TELEPHONE POWER EXTRACTION FOR EXTERNAL LOADS
South African Micro Electronic Systems
TELEPHONE INTERFACE PROTECTOR
ProTek Devices.
TELEPHONE LINE INTERFACE
Motorola => Freescale