Quick Detail:

CHMOS 16-BIT MICROCONTROLLER


Description:

The 87C196LB is a high-performance 16-bit microcontroller with integrated support for the J1850 communication protocol. The 87C196LB is composed of a high-speed core with the following peripherals: an asynchronous/synchronous serial I/O port (8096 compatible) with a dedicated 16-bit baud-rate generator; an additional synchronous serial I/O port with full duplex master/slave transceivers; a six-channel A/D converter with sample and hold; a flexible timer/counter structure with prescaler, cascading, and quadrature capabilities; six modularized, multiplexed high-speed I/O for capture and compare (called event processor array) with 200 ns resolution and double buffered inputs; and a sophisticated prioritized interrupt structure with programmable peripheral transaction server (PTS). The clock doubler circuitry and oscillator output signal enable a 4 MHz resonator to achieve the same internal clock speed as a more costly 8 MHz resonator in previous applications.
This same circuitry can drive other devices where a separate resonator was required in the past. Another costsavings feature is the fact that the I/O ports are driven low at reset, avoiding the need for pull-up resistors.


Applications:

■ 20 MHz operation†
■ 24 Kbytes of on-chip OTPROM
■ 768 bytes of on-chip register RAM
■ Register-to-register architecture
■ Peripheral transaction server (PTS) with high-speed, microcoded interrupt service routines
■ Integrated, industry-standard J1850 communication protocol
■ Six-channel/10-bit A/D with sample and hold
■ High-speed event processor array
— Six capture/compare channels
— Two compare-only channels
— Two 16-bit software timers
■ Full-duplex serial I/O port with dedicated baud-rate generator
■ Enhanced full-duplex, synchronous serial I/O port (SSIO)
■ Programmable 8- or 16-bit external bus
■ Optional clock doubler with programmable clock output signal
■ SFR register that indicates the source of the last reset
■ Design enhancements for EMI reduction
■ Oscillator failure detection circuitry
■ Watchdog timer (WDT)
■ –40° C to +125° C ambient temperature
■ 52-pin PLCC package


Specifications:

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