PCD50957H

 

 

 

FEATURES

• 80C51 ports P0, P1, P2 and P3 available for interfacing

to display, keyboard, I2

C-bus, interrupt sources and/or

external memory. Integrated 64 kbyte ROM, 3 kbytes of

data memory and 1kbyte System Data RAM. External

program memory is addressable up to 128 kbytes

• +2.7 to 5 V port (P0 to P3) interface

• TDMA frame (de)multiplexing, transmission or reception

can be programmed for any slot

• Ciphering, scrambling, CRC checking/generation and

protected B-fields

• Speech and data buffering space for six handsets

• Local call and B-field loop-back

• Two interrupt lines for BML and DSP to interrupt 80C51

• On-chip, three channel time-multiplexed 8-bit

Analog-to-Digital Converter (ADC) for RSSI

measurement, one for battery voltage measurement

and one channel available for other purposes

• On-chip 8-bit Digital-to-Analog Converter (DAC) for

electronic potentiometer function

• Phase error measurement and phase error correction by

hardware

• DACs and ADCs for dynamic earpiece and dynamic or

electret microphone

• On-chip reference voltage

• On-chip supply for electret microphone

• Very low ohmic buzzer output

• Serial interface to external ADPCM CODEC (PCD5032)

or 8 kHz u-law samples

• Speech switch for Digital Telephone Answering

Machine (DTAM) connected to SPI interface

• IOM-2 interface (Siemens registered trademark)

• Serial interface to synthesizer for frequency

programming

• Programmable polarity and timing of radio-control

signals

• GMSK pulse shaper

• On-chip comparator for use as data-slicer

 

 

 

**注意 & Noted:

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