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• SAA7118 (IC7004, pins A3 and B4): 24.576 MHz
provided by xtal 1001.
• ADV7196 (IC7703, pin 25): 27 MHz provided by
PNX7100.
• SDRAM (IC7804 and 7808, pin 38): 133 MHz provided
by the PNX7100.
• 1394-LINK (IC7201, pin 88): 49.152 MHz provided by
1394-PHY.
• 1394-PHY (IC7200, pins 59 and 60): 24.576 MHz
provided by xtal 1201.
5.6 Power Supply
The Digital Board is not powered in standby mode. The
control signal 'ION' (Inverse On), coming from the
analogue board, will enable the PSU, and power the digital
board.
• ION = High: the digital board is in powered down
standby mode.
• ION = Low: the power supply to the digital board is
enabled.
5.8 Reset
Reset concept Chrysalis board
3V3
7106
NCP303
The voltage detector NCP303LSN29 (IC7600) provides
the reset signal PNX7100_RESETn (active 'low') with the
correct timing behavior. This circuitry functions as a
Power-On Reset (POR) module, which detects the
minimum functional voltage that is needed by the device. It
also detects any voltage drop.
7400
>1
PNX7100_Resetn
CHRYSALIS
PNX7100
The 3V3, +5V, -5V, and +12V come from the PSU, while
the 1V8 core voltage is generated on the board by a low
voltage buck controller (item 7501). It provides the control
for a DC-DC power solution producing an 1.8V output
voltage over a wide current range. The NCP1570-based
solution is powered from 12 V with the output derived from
the 3V3 supply. It contains all required circuitry for a
synchronous NFET (IC7500-1 and -2) buck regulator.
5.7 Memory
Several memories are used on the Chrysalis Digital
Board:
• EEPROM IC7810: this memory contains all the
necessary boot parameters of the board.
• EEPROM IC7809: this memory contains all the
necessary parameters for the application.
• FLASH IC7807(05/11): this memory contains the
application-, diagnosis-, and service software.
3V3
GPIO
PNX7100_SYS_Resetn
When the power voltage is outside the nominal range, a
reset signal is generated by the POR module and fed to
the reset module which controls the individual reset of the
different peripherals and processing units.
DRX-2
Reset_IDEn
7104-3
&
Reset_1394n
7104-4
&
Reset_BEn
7107-1
&
Reset_PSn
7107-2
&
Analog_Resetn
7107-3
&
VIP_Resetn
7104-1
&
113
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