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BU8311KS Datasheet

  • BU8311KS

  • Panel interface

  • 12頁

  • ROHM

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Communication ICs
Panel interface
BU8310AK / BU8311KS / BU8313K
The BU8310AK, BU8311KS, and BU8313K are large-scale integrated circuits for telephones, which enable a serial in-
put / output interface between the key input required for telephone panel boards and LED control functions. They reduce
the number of wiring harnesses needed between the main board in the telephone and the panel board, and take some
of the processing load off the main CPU.
FApplications
Telephones and cordless telephones
FFeatures
1) Keypad matrix interface
1
Key input is output as 16-bit serial data.
2
Internal chattering prevention circuit built into the
key input circuit.
2) LED interface
1
LED control commands input as 16-bit serial data.
2
Bits with a pattern generator and pattern register
can be assigned three independent flashing pat-
terns in addition to being lighted or off.
3
Power consumption can be reduced using RST
pin input.
4
LED on and off control can be initiated using ENA
pin input or by commands setting all LEDs valid or
invalid.
277

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