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