BCM EBC3410, User Manual

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User’s Manual
EBC-3410 User’s Manual
3-44
3.6.16 Signal Description – IDE Connector (CN9)
The IDE interface supports PIO modes 0 to 4 and Bus Master IDE. Data transfer rates up
to 33 MB/Sec is possible.
DA [2:0] IDE Address Bits. These address bits are used to access a register or data port in a device
on the IDE bus.
DCS1#,
DCS3# IDE Chip Selects. The chip select signals are used to select the command block registers in
an IDE device. DCS1# selects the primary hard disk.
D [15:0] IDE Data Lines. D [15:0] transfers data to/from the IDE devices.
IOR# IDE I/O Read. Signal is asserted on read accesses to the corresponding IDE port addresses.
IOW# IDE I/O Write. Each signal is asserted on write accesses to corresponding the IDE port
addresses.
IORDY When deasserted, these signals extend the transfer cycle of any host register access when
the device is not ready to respond to the data transfer request.
RESET# IDE Reset. This signal resets all the devices that are attached to the IDE interface.
IRQ14 Interrupt line from hard disk. Connected directly to PC-AT bus.
DREQ The DREQ is used to request a DMA transfer from the CS5530A. The direction of the
transfers is determined by the IOR#/IOW# signals.
DACK# DMA Acknowledge. The DACK# acknowledges the DREQ request to initiate DMA transfers.
DACT# Signal from hard disk indicating hard disk activity. The signal level depends on the hard disk
type, normally active low. The signal is routed directly to the LED1.
3.6.17 Audio Connector (CN10)
Signal PIN Signal
NC 10 9 NC
Mic Bias 8 7 Mic
Line-In L 6 5 Line-In R
GND 4 3 GND
Line-Out L 2 1 Line-Out R
3.6.18 Signal Description – Audio Connector (CN10)
SPK L/R Left and right speaker output. These are the speaker outputs directly from the speaker
amplifier. Coupling capacitors must be used in order to avoid DC-currents in the speakers. If
the Audio Bracket is used these signals are supplied on the PCB. GND should be used as
return for each speaker. Maximum power: 0.5W@4
Ω
load for each channel.
Mic / Mic Bias The MIC signal is used for microphone input. This input is fed to the left microphone
channel.
Mic Bias provides 3.3V supplied through 3.2K
Ω
with capacitive decoupling to GND. This
signal may be used for bias of some microphone types.
Line-In L/R Left and right line in signals.
Line-Out L/R Left and right line out signals. Both signals are capacitor coupled and should have GND as
return.