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3−7
3.8 Header Type and BIST Registers
The header type and built-in self-test (BIST) registers indicate the TSB82AA2B PCI header type, and indicate no
built-in self test. See Table 3−7 for a complete description of the register contents.
Type: Read only
Offset: 0Eh
Default: 0000h
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Table 3−7. Header Type and BIST Registers Description
BIT FIELD NAME TYPE DESCRIPTION
15−8 BIST R Built-in self test. The TSB82AA2B device does not include a BIST; therefore, this field returns 00h when
read.
7−0 HEADER_TYPE R PCI header type. The TSB82AA2B device includes the standard PCI header, which is communicated by
returning 00h when this field is read.
3.9 OHCI Base Address Register
The OHCI base address register is programmed with a base address referencing the memory-mapped OHCI control.
When BIOS writes all 1s to this register, the value read back is FFFF F800h, indicating that at least 2K bytes of
memory address space are required for the OHCI registers. See Table 3−8 for a complete description of the register
contents.
Type: Read/Write, Read only
Offset: 10h
Default: 0000 0000h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
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
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Table 3−8. OHCI Base Address Register Description
BIT FIELD NAME TYPE DESCRIPTION
31−11 OHCIREG_PTR R/W OHCI register pointer. This field specifies the upper 21 bits of the 32-bit OHCI base address register.
10−4 OHCI_SZ R OHCI register size. This field returns 0s when read, indicating that the OHCI registers require a
2K-byte region of memory.
3 OHCI_PF R OHCI register prefetch. Bit 3 returns 0 when read, indicating that the OHCI registers are
nonprefetchable.
2−1 OHCI_MEMTYPE R OHCI memory type. This field returns 0s when read, indicating that the OHCI base address register is
32 bits wide and mapping can be done anywhere in the 32-bit memory space.
0 OHCI_MEM R OHCI memory indicator. Bit 0 returns 0 when read, indicating that the OHCI registers are mapped into
system memory space.