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UPD77015GC Datasheet

  • UPD77015GC

  • 16 bits, Fixed-point Digital Signal Processor

  • 418.16KB

  • 60頁

  • NEC   NEC

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DATA SHEET
MOS INTEGRATED CIRCUIT
碌
PD77015,77017,77018
16 bits, Fixed-point Digital Signal Processor
碌
PD77015, 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
鈥?/div>
FUNCTIONS
鈥?Instruction cycle: 30 ns (MIN.)
Operation clock: 33 MHz
External clock: 33, 16.5, 8.25, 4.125 MHz
Crystal: 33 MHz
鈥?On-chip PLL to provide higher operation clock than the external clock
鈥?Dual load/store
鈥?Hardware loop function
鈥?Conditional execution
鈥?Executes product-sum operation in one instruction cycle
鈥?/div>
PROGRAMMING
鈥?16 bits
脳
16 bits + 40 bits
鈫?/div>
40 bits multiply accumulator
鈥?8 general registers (40 bits each)
鈥?8 ROM/RAM data pointer: each data memory area has 4 registers
鈥?10 source interrupts (external: 4, internal: 6)
鈥?3 operand instructions (example: R0 = R0 +R1L鈭桼2L)
鈥?Nonpipeline on execution stage
鈥?/div>
MEMORY AREAS
鈥?Instruction memory area : 64K words
脳
32 bits
鈥?Data memory areas : 64K words
脳
16 bits
脳
2 (X memory, Y memory)
鈥?/div>
CLOCK GENERATOR
鈥?Mask option for CLKOUT pin:
Fixed to the low level.
Does not output the internal system clock.
鈥?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
碌
PD77017 also apply to the
碌
PD77015 and
碌
PD77018, 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.
漏
1993, 1994

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