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Número de pieza | UPD77018A | |
Descripción | 16 bits/ Fixed-point Digital Signal Processor | |
Fabricantes | NEC | |
Logotipo | ||
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MOS INTEGRATED CIRCUIT
µPD77018A, 77019
16 bits, Fixed-point Digital Signal Processor
µPD77018A, 77019 are 16 bits fixed-point DSPs (Digital Signal Processors) developed for digital signal processing
with its demand for high speed and precision.
Maximum operating speed of the µPD77018A, 77019 is improved compared with the µPD77015, 77017, 77018.
And the µPD77019 internal instruction RAM (4K × 32 bits) is suitable for program code replacement.
FEATURES
• FUNCTIONS
• Instruction cycle: 16.6 ns (MIN.)
Operation clock: 60 MHz
External clock: 60, 30, 20, 15, 7.5 MHz
Crystal: 60 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 +R1L∗R2L)
• 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)
In this document, all descriptions of the µPD77018A also apply to the µPD77019, unless otherwise
specified.
The information in this document is subject to change without notice.
Document No. U11849EJ2V0DS00 (2nd edition)
Date Published October 1997 N
Printed in Japan
The mark shows major revised points.
©
1996
1 page Functional Differences among the µPD7701× Family
Item
Internal instruction RAM
Internal instruction ROM
External instruction memory
Data RAM (X/Y memory)
Data ROM (X/Y memory)
External data memory
Instruction cycle
(Maximum operation speed)
External clock
(at maximum operation speed)
µPD77016
1.5K words
None
48K words
2K words each
None
48K words each
66 MHz
µPD77015
4K words
1K words each
2K words each
µPD77017
µPD77018
256 words
12K words
None
2K words each
4K words each
16K words each
µPD77018A
24K words
3K words each
12K words each
µPD77019
4K words
30 ns (33 MHz)
16.6 ns (60 MHz)
33/16.5/8.25/4.125 MHz
Variable multiple rate (1, 2, 4, 8 ) by mask option.
60/30/20/15/7.5 MHz
Variable multiple rate (1, 2, 3, 4, 8 ) by
mask option.
Crystal
(at maximum operation speed)
–
Instruction
–
Serial interface (2 Channels)
Channel 1 has the
same functions
as channel 2.
Power supply
5V
Package
160-pin plastic QFP
33 MHz
60 MHz
STOP instruction is added.
Channel 1 has the same functions as that of the µPD77016.
Channel 2 has no SORQ2 or SIAK2 pin (Channel 2 is used for CODEC connection).
3V
100-pin plastic TQFP
5 Page µPD77018A, 77019
• External data memory interface
Symbol
Pin No.
X/Y 7
DA13 - DA0
8, 9, 12 -19, 22 - 25
D15 - D0
MRD
MWR
WAIT
26 -29, 32 - 35, 38 - 41,
44 - 47
98
95
100
HOLDRQ
BSTB
HOLDAK
93
99
94
I/O Function
O Memory select signal output
(3S) • 0: X memory is used.
• 1: Y memory is used.
O Address bus to external data memory
(3S) • External data memory is accessed.
• During the external memory is not accessed, these pins
keep the previous level.
These pins are set to low level; 0000H, by reset.
They continue outputting low level until the first external
memory access.
I/O 16 bits data bus to external data memory
(3S) • External data memory is accessed.
O Read output
(3S) • Reads external memory
O Write output
(3S) • Writes external memory
I Wait signal input
• Wait cycle is input when external memory is read.
1: No wait
0: Wait
I Hold request signal input
• Input low level when external data memory bus is
expected to use.
O Bus strobe signal output
• Outputs low level while the µPD77018A is occupying
external memory bus.
O Hold acknowledge signal output
• Outputs low level when the µPD77018A permits external
device to use external data memory bus.
Remark The state of the pins added 3S becomes high impedance when bus release signal (HOLDAK = 0) is output.
11
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet UPD77018A.PDF ] |
Número de pieza | Descripción | Fabricantes |
UPD77018 | 16 bits/ Fixed-point Digital Signal Processor | NEC |
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