Product Description

The G65SC816 is an advanced CMOS 16-bit microprocessor featuring total software compatibility with 8-bit NMOS and CMOS 6500 series microprocessors. The G65SC816 provides 24 address lines for 16 Mbyte addressing, while providing both 8-bit and 16-bit operation.

Features

• Advanced CMOS design for low power consumption and increased noise immunity

• Emulation mode for total software compatibility with 6502 designs

• Full 16-bit ALU, Accumulator, Stack Pointer, and Index Registers

• Direct register for “zero page” addressing

• 24 addressing modes (including 13 original 6502 modes)

• Wait for Interrupt (WAI) and Stop the Clock (STP) instructions for reduced power consumption and decreased interrupt latency

• 91 instructions with 255 opcodes

• Co-Processor (COP) instruction and associated vector

• Powerful Block Move instructions

• Full 16-bit operation with 24 address lines for the 16 MByte memory

• Program selectable 8-bit mode for 6502 coding compatibility Valid Program Address (VPA) and Valid Data Address (VDA) outputs for dual cache and DMA cycle steal implementation

• Vector Pull (VP) output indicates when interrupt vectors are being fetched. May be used for vectoring/prioritizing interrupts

• Abort interrupt and associated vector for interrupting any instruction without modifying internal registers

• Memory Lock (ML) for multiprocessor system implementation

• 40-pin DIP, 44-pin PLCC