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PDF Z89462 Data sheet ( Hoja de datos )
| Número de pieza | Z89462 | |
| Descripción | 16-BIT/ FIXED-POINT DIGITAL SIGNAL PROCESSOR | |
| Fabricantes | Zilog. | |
| Logotipo |  |
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PRELIMINARY
Z89462
CP95DSP0400
PRELIMINARY
CUSTOMER PROCUREMENT SPECIFICATION
FEATURES
Prog. RAM Prog./Data Data RAM Speed
Part (K Words) (K Words) (Words) (MHz)
Z89462 1
64 512 20, 40
s 100-Pin QFP and 124-Pin PGA Packages
s 0°C to +70°C Temperature Range
s 3.3- to 5.0-Volt Operating Range
40 MHz Operation @ 5.0V
20 MHz Operation @ 3.3V
s Six RAM Pointers for 4K-Word RAM Banks
s Three Maskable Vectored Interrupts, Edge or Level
Trigger Selectable
Z89462
16-BIT, FIXED-POINT
DIGITAL SIGNAL PROCESSOR
s Enhanced Instruction Set
s Single-Cycle Instruction Execution
s Four-Stage Pipeline
On-Board Peripherals
s Dual 8/16-Bit CODEC Interface
s Wait-State Generator
s Two 16-Bit Timer/Counters
s Dynamic Program Bus Sizing
GENERAL DESCRIPTION
The Z89462 is a high-performance Digital Signal Processor
(DSP) optimized for processing and transferring data. This
enhanced processor provides an upward migration path
for its Z89C00/Z89321 predecessors.
The DSP provides three 12-bit Register Pointers for each
RAM bank. These pointers may be incremented or
decremented automatically to implement circular buffers
without software overhead.
Three prioritized and individually maskable interrupts are
provided for use by external peripherals requiring service
from the DSP. The interrupt inputs can be individually
conditioned for edge or level trigger. Acknowledgement of
an activated interrupt occurs at the end of an instruction
execution.
Two banks of 512 x 16-bit data RAM are available.
Expansion of the on-chip data RAM is provided through
future upgrades.
External interfaces include Address Bus and Data Bus for
external Program Memory, Address Bus and Data Bus for
external Data Memory, three vectored interrupt ports, and
two input/two output user ports.
Notes:
All Signals with a preceding front slash, "/", are active Low, e.g.,
B//W (WORD is active Low); /B/W (BYTE is active Low, only).
Power connections follow conventional descriptions below:
Connection
Circuit
Device
Power
Ground
V
CC
GND
V
DD
VSS
CP95DSP0400 (8/95)
1
1 page  
PRELIMINARY
ABSOLUTE MAXIMUM RATINGS
Z89462
CP95DSP0400
Description
Min. Max. Units
Voltages on VDD with Respect to VSS –0.5 +5.5
V
Voltages on All Pins with Respect to VSS –0.5 (VDD+0.5) V
TSTG Storage Temp
–85° +150° °C
TA Oper Ambient Temp 0° +70° °C
Stresses greater than those listed under Absolute Maximum
Ratings may cause permanent damage to the device. This
is a stress rating only; operation of the device at any
condition above those indicated in the operational sections
of these specifications is not implied. Exposure to absolute
maximum rating conditions for extended period may affect
device reliability.
STANDARD TEST CONDITIONS
The AC and DC Characteristics listed below apply for
standard test conditions, unless otherwise noted. All
voltages are referenced to V (= Ground = 0V). Positive
SS
current flows into the referenced pin. Standard conditions
are as follows:
3.0V < VDD < 3.6V
VSS = 0V
Ambient Temperature = 0°C to +70°C
Standard Test Load on All Outputs
DC ELECTRICAL CHARACTERISTICS
(5.0V Operation)
Sym.
Parameter
Min.
VIH Input High Voltage
V Input Low Voltage
IL
VOH1 Output High Voltage (–4 mA IOH)
VOH2 Output High Voltage (–250 µA IOH)
VOL Output Low Voltage (4 mA IOL)
IIL Input Leakage Current
I Tri-State Leakage Current
TL
IDD Power Supply Current (@ 40 Mhz)
IDD2 Stopped Clock Power Supply Current
C Input Capacitance (f = 1 MHz)
IN
COUT Output Capacitance (f = 1 Mhz)
C I/O Capacitance (f = 1 MHz)
IO
CL Output Load Capacitance
Notes:
[1] VIN = 0.4V
[2] 0.4V < VOUT < 2.4V
[3] VDD = 5.0V, VIH = 4.8V, VIL = 0.2V
[4] VDD = 5.0V, VIH = 4.8V, VIL = 0.2V
[5] Unmeasured pins returned to VSS.
2.0
–0.5
2.4
VDD –0.8
–10
–10
Max.
VDD +0.5
0.8
0.5
+10
+10
TBD
20
15
15
15
30
Unit Note
V
V
V
V
V
µA [1]
µA [2]
mA [3]
µA [4]
pF [5]
pF [5]
pF [5]
pF
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet Z89462.PDF ] | |
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