參數(shù)資料
型號(hào): BT848A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 98/141頁
文件大?。?/td> 1149K
代理商: BT848A
Bt848/848A/849A
Single-Chip Video Capture for PCI
88
C
ONTROL
R
EGISTER
D
EFINITIONS
Revision ID and Class Code Register
L848A_A
Revision ID and Class Code Register
PCI Configuration Header Location 0x08
Latency Timer Register
PCI Configuration Header Location 0x0C
Note that bits [23:16] do return 0x00 indicating Bt848 is a single-function device and implements header type 0.
Base Address 0 Register
PCI Configuration Header Location 0x10
Bits
Type
Default
Name
Description
[31:8]
RO
0x040000
Class Code
Bt848 is a multimedia video device.
[7:0]
RO
0x0X
Revision ID
This register identifies the device revision.
Bits
Type
Default
Name
Description
[15:8]
RW
0x00
Latency Timer
The number of PCI bus clocks for the latency timer used by the
bus master. Once the latency expires, the master must initiate
transaction termination as soon as GNT is removed.
Bits
Type
Default
Name
Description
[31:12]
RW
Assigned
by CPU
at boot-up
Relocatable
memory pointer
Determine the location of the registers in the 32-bit addressable
memory space.
[11:0]
RO
0x008
Memory usage
specification
Reserve 4 KB of memory-mapped address space for local regis-
ters. Address space is prefetchable without side effects.
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