Texas Instruments TSB12LV26 manual Guid High Register, Guid Low Register, Guid high, Guid low

4.10 GUID High Register

The GUID high register represents the upper quadlet in a 64-bit global unique ID (GUID) which maps to the third quadlet in the Bus_Info_Block. This register contains node_vendor_ID and chip_ID_hi fields. This register initializes to 0s on a hardware reset, which is an illegal GUID value. If a serial ROM is detected, then the contents of this register are loaded through the serial ROM interface after a PCI reset. At that point, the contents of this register cannot be changed. If no serial ROM is detected, then the contents of this register are loaded by the BIOS after a PCI reset. At that point, the contents of this register cannot be changed.

Bit	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Name								GUID high
Type	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Default	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Name								GUID high
Type	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Default	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Register:		GUID high
	Type:		Read-only
	Offset:		24h
	Default:		0000 0000h

4.11 GUID Low Register

The GUID low register represents the lower quadlet in a 64-bit global unique ID (GUID) which maps to chip_ID_lo in the Bus_Info_Block. This register initializes to 0s on a hardware reset and behaves identically to the GUID high register (OHCI offset 24h, see Section 4.10).

Bit	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Name								GUID low
Type	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Default	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Name								GUID low
Type	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Default	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Register:		GUID low
	Type:		Read-only
	Offset:		28h
	Default:		0000 0000h

4±10