Artesyn ATCA-7480 Installation and Use (February 2015) - Manual (Page 155)

Maps and Registers
ATCA-7480 Installation and Use (6806800T17A) 155
5.1.17 PCI Express Hot Plug I2C IO Expander Registers
Each CPU supports four PCI Express Hot Plug ports.
5.1.17.1 CPU0 Hot Plug I2C IO Expander Registers
The Hot Plug registers for CPU0 are mapped to 0x30 to 0x37
5.1.17.2 CPU1 Hot Plug I2C IO Expander Registers
The Hot Plug registers for CPU1 are mapped to 0x38 to 0x3F.
5.1.17.3 Hot-Plug Virtual Pin Port Registers
Each Port has a Hot Plug Interface, which can be accessed by the Hot-Plug Virtual Pin Port
Register (
Table 5-74 ).
Table 5-74 Hot-Plug Virtual Pin Port Register
Address Offset:
CPU0: Port 1: 0x30,Port 2: 0x31, Port 3: 0x32, Port 4: 0x33
CPU1: Port 1: 0x38,Port 2: 0x39, Port 3: 0x3A, Port 4: 0x3B
Bit Signal Name Direction Description Default Access
0 ATNLED Output This indicator is connected to the
Attention LED on the baseboard.
For a precise definition refer to PCI
Express Base Specification, Revision
3.0. Ext. r
1 PWRLED Output This indicator is connected to the
Power LED on the baseboard. For a
precise definition refer to PCI
Express Base Specification, Revision
3.0. Ext. r
2 PWREN# Output Output signal allowing software to
enable or disable power to a PCI
Express slot. Ext. r