Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 - Manual (Page 251)

11−13
11.20 Power Management Data Register
The power management bridge support extension register provides extended power-management features not
applicable to the flash media controller; thus, it is read-only and returns 0 when read.
Bit 7 6 5 4 3 2 1 0
Name Power management data
Type R R R R R R R R
Default 0 0 0 0 0 0 0 0
Register: Power management data
Offset: 4Bh
Type: Read-only
Default: 00h
11.21 General Control Register
The general control register provides miscellaneous PCI-related configuration. See Table 11−14 for a complete
description of the register contents.
Bit 7 6 5 4 3 2 1 0
Name General control
Type R R R RW RW RW RW RW
Default 0 0 0 0 0 0 0 0
Register: General control
Offset: 4Ch
Type: Read/Write, Read-only
Default: 00h
Table 11−14. General Control Register
BIT FIELD NAME TYPE DESCRIPTION
7 RSVD R Reserved. Bit 7 returns 0 when read.
6−5 ‡ INT_SEL RW Interrupt select. These bits are program the INTPIN register and set which interrupt output is used.
This field is ignored if one of the USE_INTx terminals is asserted.
00 = INTA
01 = INTB
10 = INTC
11 = INTD
4 ‡ D3_COLD RW D3cold PME support. This bit sets and clears the D3cold PME support bit in the power management
capabilities register.
3 RSVD R Reserved. Bit 3 returns 0 when read.
2 ‡ SM_DIS RW SmartMedia disable. Setting this bit disables support for SmartMedia cards. The flash media
controller reports a SmardMedia card as an unsupported card if this bit is set. If this bit is set, then
all of the SM_SUPPORT bits in the socket enumeration register are 0.
1 ‡ MMC_SD_DIS RW MMC/SD disable. Setting this bit disables support for MMC/SD cards. The flash media controller
reports a MMC/SD card as an unsupported card if this bit is set. If this bit is set, then all of the
SD_SUPPORT bits in the socket enumeration register are 0.
0 ‡ MS_DIS RW Memory Stick disable. Setting this bit disables support for Memory Stick cards. The flash media
controller reports a Memory Stick card as an unsupported card if this bit is set. If this bit is set, then
all of the MS_SUPPORT bits in the socket enumeration register are 0.
‡ One or more bits in this register are cleared only by the assertion of GRST.