The MS8503H1 designed for the SMS phone applications with the caller ID function. It built-in to OTP base micro-controller for operation of the entire system with up to 16K bytes RAM. It supporting up to 1M bytes ROM and several I/O interfaces designed for handshaking with the other peripheral devices and provide two serial interfaces and LCD interface.
■ The MS85321 including the functionalities of
■ FSK transceiver
■ a high performance CPE Alerting Tone (CAS) detection
■ DTMF generation
■ Ring detection
■ Low Voltage indication.
■ 8-Bit micro-controller built in
■ Operating voltage range: 2.5~5.5V
■ 256K bytes internal ROM (Up to 753K bytes external ROM)
■ 4K bytes internal RAM (External: 8K bytes.)
■ Power Management
■ Standby mode
■ Stop mode
■ Only single crystal (32768Hz)
■ Programmable MCU clock rate
■ 4.194MHz, 2.097MHz, 1.049MHz, and 0.524MHz.
■ Low speed: 32768Hz.
■ Input port and I/O ports interface. (32 I/O + 8 Mutil-I/O)
■ Input port: 8 pins with interrupt option.
■ I/O port A~B: 16 pins I/O ports with non-open drain structure.
■ Open drain I/O port: 4 pins.
■ Heavy driving output port: 4 pins.
■ Multiple-function I/O ports: MPORT0~7.
■ Low voltage detector
■ Two 8-Bit general-purposed timers
■ A watchdog timer against deadlock.
■ UART controller
■ Universal synchronous serial Interface (SSI)
■ Priority-based interrupts.
■ LCD driver interface
■ Memory Interface:(Parallel Interface.)
■ Ring and line reversal detector
■ FSK Transceiver & Carrier detector
■ CAS (CPE Alert Signal)/TAS detector
■ DTMF (Dual Tone Multiple Frequency) generator
■ DTMF Decoder
■ Ringer/Music tone generator
■ Calling number delivery (CND)
■ Calling name delivery (CNAM) features
■ Caller identification on call waiting (CIDCW) features
■ Corded or Cordless adjunct boxes phone set
■ Short Message Service system.
■ Corded or Cordless Feature phones
■ Other communication systems
■ 128 Pins QFP packaged.