PRELIMINARY
TECHNICAL
DATA
PRELIMINARY
TECHNICAL
DATA

For current information contact Analog Devices at (781) 461-3881

ADSP-2192 October 2000
This information applies to a product under development. Its characteristics and specifications are subject to change with-

out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.

32 REV. PrAto PCIVAUX and VCTRLVDD will switch off the primary supply. USB applications may require an external high-effi-ciency switching regulator to generate the 2.5V supply for the ADSP-2192.

Low Power Operation

In addition to supporting the PCI and USB standard’s power down modes, the ADSP-2192 supports additional power down modes for the DSP core’s and peripheral buses. The power down modes are controlled by the DSP1 and DSP2 Interrupt/Powerdown registers.

Clock Signals

The ADSP-2192 can be clocked by a crystal oscillator. If a crystal oscillator is used, the crystal should be connected across the XTALI/O pins, with two capacitors connected as shown in Figure 8 on page 33. Capacitor values are depen-dent on crystal type and should be specified by the crystal

Figure 6. ADSP-2192 Boot Process Flow

DSP EMERGES FROM ~RESET AND
PROGRAM FLOW JUMPS TO BOOT ROM
LOADER KERNEL READS CRST PINS AND DETERMINES MODE
OF BOOTING; ALSO PERFORMS HOUSEKEEPING
OPERATIONS, SETTING UP INTERRUPTS, ETC.
LOADER KERNEL READS BUS MODE PINS TO SET UP
BUS CONFIGURATION
CALL SUBROUTINE TO AUTO-
DETECT SERIAL EEPROM
SERIAL
EEPROM
EXISTS?
DETERMINE 8 OR 16-BIT?
SPI OR MICRO-WIRE?
TRANSFER CONTROL TO PCI
OR USB TO FACILITATE REST
OF BOOT
NO
YES
LOAD SERIAL EEPROM CONFIGURATION AND DATA PACKETS
LOAD PCI/USB CONFIG REGISTERS ACCORDINGLY
AFTER BOOTING IS COMPLETE, USER
HAS OPTION TO EITHER RETURN TO
SERIAL EEPROM OR JUMP TO USER
CODE AND BEING EXECUTION
DO ANY SERIAL
EEPROM NEED TO
BE EXECUTED?
NO
YES
EXECUTE PACKETS
FINISH

Figure 7. ADSP-2192 2.5V Regulator Options

+
-
VREF
IVDD
VCTRLVDD
VCTRLAUX
PCI VDD
DSP
INTERNAL
CIRCUIT
EXTERNAL
COMPONENTS
2.5V @ 500MA 3.0V -> 5.5V
3.0V -> 3.6V
PCI VAUX
ZETEX
FZT951
ZETEX
FZT951
TANTALUM
OR
ELECTROLYTIC
CERAMIC
10 µ
µµ
µF.1 µ
µµ
µF