ADLINK ETX-PVR - Manual (Page 30)

Chapter 3 Hardware
24 Reference Manual ETX-PVR
Audio Interface
The Realtek HD Audio CODEC (ALC262) on the ETX-PVR supports the HDA Link protocol and the
supported features in the following list.
• Supports audio amplifier on baseboard
• PC-Beep pass through to Line Out while reset is held Active Low
• True Line Level Output with volume control independent of Line Out
• Digital 3V and 5V compliant
Table 3-4 provides a complete list of the ETX J1 connector signals.
Table 3-4. Complete X1 Interface Pin Signal Descriptions (J1)
J1
Pin
# Signal Description
1, 2 GND Ground
3 PCICLK3 PCI clock 3 – This signal line is one of four signal lines. These clock signals
provide the timing outputs for four external PCI devices and the timing for all
transactions on the PCI bus.
4 PCICLK4 PCI clock 4 – Refer to J1, pin-3 for more information.
5, 6 GND Ground
7 PCICLK1 PCI clock 1 – Refer to J1, pin-3 for more information.
8 PCICLK2 PCI clock 2 – Refer to J1, pin-3 for more information.
9 REQ3* Bus Request 3 – This signal line is one of four signal lines. These signals indicate
to the arbiter that the device desires use of the bus.
10 GNT3* Grant 3 – This signal line is one of four signal lines. These signal lines indicate
access has been granted to the requesting device (PCI Masters).
11 GNT2* Grant 2 – Refer to J1, pin-10 for more information.
12 +3.3V +3.3 volts +/- 5% (Caution: This signal is generated by the ETX-PVR.)
[Note: This signal is not supported on ETX-PVR-R-14, R-16, and R-18 models.]
13 REQ2* Bus Request 2 – This signal line is one of four signal lines. These signals indicate
the device desires use of the bus to the arbiter.
14 GNT1* Grant 1 – Refer to J1, pin-10 for more information.
15 REQ1* Bus Request 1 – Refer to J1, pin-13 for more information.
16 +3.3V +3.3 volts +/- 5% (Caution: This signal is generated by the ETX-PVR.)
[Note: This signal is not supported on ETX-PVR-R-14, R-16, and R-18 models.]
17 GNT0* Grant 0 – Refer to J1, pin-10 for more information.
18 NC Not Connected (Reserved)
19,
20 VCC DC Power – +5 volts +/- 5%
21 SERIRQ Serial Interrupt Request – This signal supports the serial interrupt protocol.
22 REQ0* Bus Request 0 – Refer to J1, pin-13 for more information.
23 AD0 Address/Data bus 0 – These signals <AD31 – AD0> are multiplexed on the same
PCI connector pins. During the address phase of a PCI cycle, AD31–AD0
contain a 32-bit address or other destination information. During the data phase,
AD31 – AD0 contain data.