WDC 65C134

The Western Design Center (WDC) W65C134S is an 8-bit CMOS microcontroller based on a W65C02S processor core, which is a superset of the MOS Technology 6502 processor. The W65C134S consists of a fully static 8-bit W65C02S CPU core, 4 KB of ROM containing a machine language monitor, 192 bytes of SRAM, two 16 bit timers, one 16-bit Watch-Dog Timer (WDT) with "restart" interrupt, one UART with baud rate timer, a low power Serial Interface Bus (SIB) configured as a token passing local area network, twenty-two priority encoded interrupts, two crystal inputs (slow 32.768KHz and fast up to 8-MHz), Bus Control Register (BCR) for external memory bus control, interface circuitry for peripheral devices, and many low power features. The W65C134S has been developed for high-reliability applications, as well as where minimum power is required. Features CMOS low power process Operating ambient temperature range of -40 °C to +85 °C Single 2.8V to 5.5V power supply Static to 8 MHz clock operation, as well as 32.768KHz capability W65C02S compatible CPU 8-bit parallel processing Variable length stack True indexing capability Fifteen addressing modes Decimal or binary arithmetic Pipeline architecture Fully static CPU Single chip microcomputer Many power saving features 56 CMOS compatible I/O lines 4096 x 8 ROM on chip 192 x 8 RAM on chip Low power modes WAIt for interrupt SToP the clock Fast oscillator start and stop feature Twenty-two priority encoded interrupts BRK software interrupt RESET "RESTART" interrupt NMIB Non-Maskable Interrupt input SIB Interrupt IRQ1B level interrupt input IRQ2B level interrupt input 2 timer edge interrupts 7 positive edge interrupt inputs 5 negative edge interrupt inputs Asynchronous Receiver Interrupt Asynchronous Transmitter Interrupt UART 7/8-bit w/wo odd or even parity 16M byte segmented address space 64K byte linear address space 4 x 16 bit timer/counter Bus control register for external memory Internal or external ROM 8 Decoded Chip Select outputs Surface mount 68 and 80 lead packages Real time clock features Time of Day (ToD) clock features See also WDC 65C265 - a 16-bit microcontroller based around a WDC 65C816 processor core