CNR Riser Card Pinout



CNR Riser Bus Description

The Communication and Networking Riser {CNR} specification defines a hardware scalable Original Equipment Manufacturer (OEM) mother board riser and interface that supports the audio, modem, and local area network (LAN) interfaces of core logic chipsets. This standard does not support an expansion slot, but an OEM built in board to include the Motherboard connector [CNR Connector]. Supported interface buses include, AC '97, SMBus and USB including Power and a LAN interface. The board size and pinout are also defined in the specification for the ATX series of motherboard form factor. It appears Intel no longer produces CNR slots on its Pentium 4 Processor based Motherboards. The CNR standard was replaced by another standard, refer to the main PC Riser Card page for other Rise card form factors. The CNR specification defined two connector types. The pinout for types 'A' and type 'B' are listed below.
The Type 'A' pinout is listed first, followed by the Type 'B' pin out.


CNR Riser Card Pinout, Type A
Pin # B Side A Side
1 Reserved Reserved
2 Reserved Reserved
3 Reserved GND
4 GND Reserved
5 Reserved Reserved
6 Reserved GND
7 GND LAN_TXD2
8 LAN_TXD1 LAN_TXD0
9 LAN_RSTSYNC GND
10 GND LAN_CLK
11 LAN_RXD2 LAN_RXD1
12 LAN_RXD0 Reserved
13 GND USB+
14 Reserved GND
15 +5Vdual USB-
16 USB_OC# +12V
17 GND GND
18 -12V +3.3Vdual
19 +3.3VD +5VD
KEY
KEY
20 GND GND
21 EE_DOUT EE_DIN
22 EE_SHCLK EE_CS
23 GND SMB_A1
24 SMB_A0 SMB_A2
25 SMB_SCL SMB_SDA
26 CDC_DN_ENAB# AC97_RESET#
27 GND Reserved
28 AC97_SYNC AC97_SDATA_IN1
29 AC97_SDATA_OUT AC97_SDATA_IN0
30 AC97_BITCLK GND




CNR Riser Card Pinout, Type B
Pin # B Side A Side
1 MIL_MDIO MIL_MDC
2 MIL_COL MIL_CRS
3 MIL_TXC GND
4 GND MIL_RXDV
5 MIL_RXERR MIL_RXC
6 MIL_TXD3 GND
7 GND MIL_TXD2
8 MIL_TXD1 MIL_TXD0
9 MIL_TXEN GND
10 GND Reserved
11 MIL_RXD2 MIL_RXD1
12 MIL_RXD0 MIL_RXD3
13 GND USB+
14 Reserved GND
15 +5V dual USB-
16 USB_OC# +12V
17 GND GND
18 -12V +3.3V dual
19 +3.3VD +5VD
KEY
KEY
20 GND GND
21 EE_DOUT EE_DIN
22 EE_SHCLK EE_CS
23 GND SMB_A1
24 SMB_A0 SMB_A2
25 SMB_SCL SMB_SDA
26 CDC_DN_ENAB# AC97_RESET#
27 GND Reserved
28 AC97_SYNC AC97_SDATA_IN1
29 AC97_SDATA_OUT AC97_SDATA_IN0
30 AC97_BITCLK GND




Note AC97 is dated, or maybe out-dated depending on your view point.


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Modified: 3/05/12
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