- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382720 > UCB1500 (NXP SEMICONDUCTORS) PCI to AC97 bridge/host controller PDF資料下載
參數(shù)資料
| 型號： | UCB1500 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | PCI to AC97 bridge/host controller |
| 中文描述： | PCI BUS CONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-315-1, LQFP-80 |
| 文件頁數(shù)： | 43/58頁 |
| 文件大?。?/td> | 1001K |
| 代理商： | UCB1500 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁當前第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁
Philips Semiconductors
UCB1500
PCI to AC97 bridge/host controller
Objective specification
Rev. 01 — 4 February 2000
43 of 58
9397 750 06854
Philips Electronics N.V. 2000. All rights reserved.
9.
DMA engine application notes
All DMA transfers use Descriptor Tables (DT). The DT must be contiguous in the Host
memory, and each DMA channel must have its own DT set up as one buffer. For
transmission, each DT must have not empty DT entries, and the last entry of a DT
must point to valid data, or to a linked descriptor table. Each DT entry is 8 bytes in
size. It contains the base address, byte count and command/status bits as illustrated
in
Figure 4
.
Each DMA channel has a DTP (Descriptor Table Pointer), which points to entries in
the descriptor tables. When the last entry in the descriptor table is reached, and the
corresponding buffer is completely utilized, the DMA controller can jump to a new
descriptor table, if necessary, as specified by the link bit of the last entry. The entire
process is repeated for the remainder of the transfer session.
Note:
1. DT must be quad-word aligned. There are no restrictions to the size of the DT. No
empty DT entries are allowed. The DT has to be in the continuous physical
memory space up to 4 GigaBytes.
2. The data buffer area pointed by each DT entry must not exceed 64K
1 in size.
The data address must be double-word aligned as the UCB1500 fetches 4 bytes
at a time.
Fig 4.
Descriptor Table entry format
31
0
23
15
BYTE
0
4
Data area BASEADDR in physical memory
CMD/STT
COUNT
SC00209
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC1913D | Very low drop voltage regulators with inhibit |
| UCC1913DTR | Analog IC |
| UCC1913J | Very low drop voltage regulators with inhibit |
| UCC1913N | Very low drop voltage regulators with inhibit |
| UCC1926DS | Very low drop voltage regulators with inhibit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCB1510 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:AC97 digital modem codec |
| UCB15-101T-RC | 制造商:ALLIED 制造商全稱:Allied Components International 功能描述:Ultra Current Beads |
| UCB1510DB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:AC97 digital modem codec |
| UCB15-121T-RC | 制造商:ALLIED 制造商全稱:Allied Components International 功能描述:Ultra Current Beads |
| UCB15-600T-RC | 制造商:ALLIED 制造商全稱:Allied Components International 功能描述:Ultra Current Beads |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。