Datasheet

Signal Description
Intel
®
Atom™ Processor E6xx Series Datasheet
35
2.3 PCI Express* Signals
2.4 Intel
®
High Definition Audio
β
Interface Signals
Table 7. PCI Express* Signals
Signal Name Direction/Type
Power
Well
Description
PCIE_PETp[3:0]
PCIE_PETn[3:0]
O
PCIe*
Core
PCI Express* Transmit: PCIE_PET[3:0] are PCI Express*
Ports 3:0 transmit pair (P and N) signals.
PCIE_PERp[3:0]
PCIE_PERn[3:0]
I
PCIe*
Core
PCI Express* Receive: PCIE_PER[3:0] PCI Express* Ports
3:0receive pair (P and N) signals.
PCIE_CLKINP
PCIE_CLKINN
I
PCIe*
Core
PCI Express* Input Clock: 100-MHz differential clock
signals.
PCIE_ICOMPO
I/O
A
Core
PCI Express* Compensation Pin: Output compensation
for both current and resistance.
PCIE_ICOMPI
I/O
A
Core
PCI Express* Compensation Pin: Input compensation for
current.
PCIE_RCOMPO
I/O
A
Core
PCI Express* Compensation Pin: PCI Express* Resistance
Compensation
PCIE_RBIAS
I/O
A
Core
PCI Express* Compensation Pin: PCI Express* Bias
control
Table 8. Intel
®
High Definition Audio
β
Interface Signals
Signal Name
Direction/
Type
Power
Well
Description
HDA_RST_B
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Reset: This signal is the reset to external
codecs
HDA_SYNC
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Sync: This signal is an 48-kHz fixed rate
sample sync to the codec(s). It is also used to encode the
stream number.
HDA_CLK
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Clock (Output): This signal is a
24.000 MHz serial data clock generated by the Intel
®
HD
Audio
β
controller. This signal contains an integrated pull-
down resistor so that it does not float when an Intel
®
HD
Audio
β
codec (or no codec) is connected.
HDA_SDO
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Serial Data Out: This signal is a serial
TDM data output to the codec(s). The serial output is double-
pumped for a bit rate of 48 MB/s for Intel
®
HD Audio
β
.
HDA_SDI[1:0]
I
CMOS_HDA
Core
Intel
®
HD Audio
β
Serial Data In: These serial inputs are
single-pumped for a bit rate of 24 MB/s. They have
integrated pull-down resistors that are always enabled.
HDA_DOCKEN_B
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Dock Enable: This active low signal
controls the external Intel
®
HD Audio
β
docking isolation logic.
When deasserted, the external docking switch is in isolate
mode. When asserted, the external docking switch
electrically connects the Intel
®
HD Audio
β
dock signals to the
corresponding processor signals.
HDA_DOCKRST_B
O
CMOS_HDA
Core
Intel
®
HD Audio
β
Dock Reset: This signal is a dedicated
reset signal for the codec(s) in the docking station. It works
similar to, but independent of, the normal HDA_RST_B
signal.