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[edit]

• 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[edit]

• WDC 65C265 - a 16-bit microcontroller based around a WDC 65C816 processor core

References[edit]

Further reading[edit]

External links[edit]

• W65C134S webpage - Western Design Center (WDC)
• W65C134S datasheet - WDC
• W65C134S monitor ROM manual - WDC