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UPD77018GC fiches techniques PDF

NEC - 16 bits/ Fixed-point Digital Signal Processor

Numéro de référence UPD77018GC
Description 16 bits/ Fixed-point Digital Signal Processor
Fabricant NEC 
Logo NEC 





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UPD77018GC fiche technique
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD77015,77017,77018
16 bits, Fixed-point Digital Signal Processor
µPD77015, 77017, 77018 are 16 bits fixed-point DSPs (Digital Signal Processors) developed for digital signal
processing with its demand for high speed and precision.
FEATURES
FUNCTIONS
• Instruction cycle: 30 ns (MIN.)
Operation clock: 33 MHz
External clock: 33, 16.5, 8.25, 4.125 MHz
Crystal: 33 MHz
• On-chip PLL to provide higher operation clock than the external clock
• Dual load/store
• Hardware loop function
• Conditional execution
• Executes product-sum operation in one instruction cycle
PROGRAMMING
• 16 bits × 16 bits + 40 bits 40 bits multiply accumulator
• 8 general registers (40 bits each)
• 8 ROM/RAM data pointer: each data memory area has 4 registers
• 10 source interrupts (external: 4, internal: 6)
• 3 operand instructions (example: R0 = R0 +R1LR2L)
• Nonpipeline on execution stage
MEMORY AREAS
• Instruction memory area : 64K words × 32 bits
• Data memory areas : 64K words × 16 bits × 2 (X memory, Y memory)
CLOCK GENERATOR
• Mask option for CLKOUT pin:
Fixed to the low level.
Does not output the internal system clock.
• Selectable source clock: external clock input and crystal resonator
[External clock]
On-chip PLL to provide higher operation clock (33 MHz MAX.) than the external clock.
Variable multiple rates (1, 2, 4, 8) by mask option.
[Crystal resonator]
Oscillation frequency corresponds directly to the system clock frequency (Sure to specify the mask option
frequency multiple as "1").
In this document, all descriptions of the µPD77017 also apply to the µPD77015 and µPD77018, unless
otherwise specified.
The information in this document is subject to change without notice.
Document No. U10902EJ3V0DS00 (3rd edition)
Date Published June 1997 N
Printed in Japan
The mark shows major revised points.
©
1993, 1994

PagesPages 30
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