Arcam RDAC - Manuale di servizio - Pagina 3
Sfoglia online o scarica il pdf Manuale di servizio per Convertitore multimediale Arcam RDAC -. Arcam RDAC - 14. Wireless usb transmitter
Anche per Arcam RDAC -: Faq (4 pagine), Manuale di servizio (14 pagine)
Main micro
circuit page 2
The main micro at location IC107 (on the diagram this is split into two area these are micro
power and config + Micro I/O) we will deal with Micro power and config 1
Micro power and config
Two separate power supplies are required by the AT91SAM these are taken from 3V3 and 1V8
for the processor core – the micro is programmed with bespoke Arcam code the oscillator for
the micro is at X101 and runs at 4MHz the TDI TDO TCK TMS ERASE NRST pins are for
development Debug use and the connecter at location CON103 is not fitted to production items
Micro I/O
Pin descriptions
Pin name
Description
SPDIF INT
Interrupt flag from the SPDIF receiver
Source
To source select TACT switch
Mute RLY
Control of mute relay via TR100
DAC MUTE
DAC MUTE signal to Pin 25 of Wolfson DAC at location IC301
ENABLE KLEER
To MUX at location IC205A
ENABLE SPDIF
To MUX at location IC202A
SERIAL UC to KLEER Serial control to KLEER wireless option
SERIAL KLEER to UC Serial data from KLEER to UC
SCL
To EEprom at location IC108 / DAC at location IC301 / USB receiver at
IC103
SDA
To EEprom at location IC108 / DAC at location IC301 / USB receiver at
IC103
Enable LEDS
LEDs on control
LED 0
Binary select for LED control via 3 – 8 line decoder at location IC102
LED 1
Binary select for LED control via 3 – 8 line decoder at location IC102
LED 3
Binary select for LED control via 3 – 8 line decoder at location IC102
st
.