CALIFORNIA MICRO DEVICES
G65SC816
CMOS 8/16-BIT MICROPROCESSOR FAMILY
Features
聲 Advanced CMOS design for low power consumption
and increased noise immunity
聲 Emulation mode for total software compatibility
with 6502 designs
聲 Full 16-bit ALU, Accumulator, Stack Pointer,
and Index Registers
聲 Direct register for 聯(lián)zero page聰 addressing
聲 24 addressing modes (including 13 original
6502 modes)
聲 Wait for Interrupt (WAI) and Stop the Clock (STP)
instructions for reduced power consumption and
decreased interrupt latency
聲 91 instructions with 255 opcodes
聲 Co-Processor (COP) instruction and associated vector
聲 Powerful Block Move instructions
聲 Full 16-bit operation with 24 address lines for the
16 MByte memory
聲 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
聲 Vector Pull (VP) output indicates when interrupt
vectors are being fetched. May be used for
vectoring/prioritizing interrupts
聲 Abort interrupt and associated vector for interrupting
any instruction without modifying internal registers
聲 Memory Lock (ML) for multiprocessor system
implementation
聲 40-pin DIP, 44-pin PLCC
Contact factory for complete data sheet.
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.
This microprocessor contains an Emulation (E) mode for emulating 8-bit NMOS and CMOS 6500 Series microprocessors.
A software switch determines whether the processor is in the 8-bit emulation mode or in the native 16-bit mode. This
allows existing 8-bit system designs to use the many powerful features of the G65SC816.
Block Diagram
RES
NMI
IRQ
ABORT
INDEX X & Y STACK
POINTER REGS (16)
INTERRUPT
CONTROL
ALU (16)
ADDRESS BUFFER
CONROL
SIGNALS
16-BIT INTERNAL DATA BUS
INSTRUCTION
DECODE
AND
CONTROL
TIMING
AND
CLOCK GEN
A0 A15
ACCUMULATOR
(16)
RDY
脴
2 (IN)
脴
1 (OUT)
脴
2 (OUT)
PROGRAM
COUNTER (16)
DIRECT REG
(16)
PROGRAM DATA
BANK RAGS (8)
SYSTEM
CONTROL
D0/BA0-D7/BA7
CPU
STATUS
REG
R/W
SYNC
VPA
VDA
ML
VP
E
M/X
BE
DATA BUS BANK
ADDRESS BUFFER
SO
漏 1987, 1996 CMD Corp. All rights reserved.
8/96
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
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