AMD M56 Reference Manual page 338

Display Output Registers
DC_GPIO_HPD2_MASK
Control GPIO functionality of the Hot Plug Detect pads - all fields are active high.
Field Name
DC_GPIO_HPD1_A
DC_GPIO_HPD2_A
Asynchronous inputs for the HPD pads when the GPIO functionality is enabled by the DC_GPIO_HPD_MASK register.
Field Name
DC_GPIO_HPD1_EN
DC_GPIO_HPD2_EN
Output enable values for the HPD pads when the GPIO functionality is enabled by the DC_GPIO_HPD_MASK register.
Field Name
DC_GPIO_HPD1_Y (R)
DC_GPIO_HPD2_Y (R)
Output values of the HPD pads.
Field Name
DC_GPIO_BLON_MASK
DC_GPIO_DIGON_MASK
Control GPIO functionality of the BLON & DIGON pads - all fields are active high.
Field Name
DC_GPIO_BLON_A
DC_GPIO_DIGON_A
Asynchronous inputs for the BLON & DIGON pads when the GPIO functionality is enabled by the DC_GPIO_PWRSEQ_MASK register.
Field Name
M56 Register Reference Manual
2-332
8 0x0
DC_GPIO_HPD_A - RW - 32 bits - DISPDEC:0x7E94
Bits Default
0 0x0
8 0x0
DC_GPIO_HPD_EN - RW - 32 bits - DISPDEC:0x7E98
Bits Default
0 0x0
8 0x0
DC_GPIO_HPD_Y - RW - 32 bits - DISPDEC:0x7E9C
Bits Default
0 0x0
8 0x0
DC_GPIO_PWRSEQ_MASK - RW - 32 bits - DISPDEC:0x7EA0
Bits Default
0 0x0
8 0x0
DC_GPIO_PWRSEQ_A - RW - 32 bits - DISPDEC:0x7EA4
Bits Default
0 0x0
8 0x0
DC_GPIO_PWRSEQ_EN - RW - 32 bits - DISPDEC:0x7EA8
Bits Default
Enable/Disable GPIO functionality on HPD2 pad
0=Pad Driven by Hardware - Normal Operation
1=Pad Controlled by Software through associated GPIO registers.
Pad values generated by hardware are overridden.
Description
Asynchronous input for HPD1 when DC_GPIO_HPD1_MASK = 1.
Asynchronous input for HPD2 when DC_GPIO_HPD2_MASK = 1.
Description
Output enable for HPD1 when DC_GPIO_HPD1_MASK = 1.
Output enable for HPD2 when DC_GPIO_HPD2_MASK = 1.
Description
Value on HPD1 pad.
Value on HPD2 pad.
Description
Enable/Disable GPIO functionality on BLON pad
0=Pad Driven by Hardware - Normal Operation
1=Pad Controlled by Software through associated GPIO registers.
Pad values generated by hardware are overridden.
Enable/Disable GPIO functionality on DIGON pad
0=Pad Driven by Hardware - Normal Operation
1=Pad Controlled by Software through associated GPIO registers.
Pad values generated by hardware are overridden.
Description
Asynchronous input for BLON when DC_GPIO_BLON_MASK = 1.
Asynchronous input for BIGON when DC_GPIO_DIGON_MASK = 1.
Description
© 2007 Advanced Micro Devices, Inc.
Proprietary