參數(shù)資料
型號： PDI1394P25
廠商： NXP Semiconductors N.V.
英文描述： 1-port 400 Mbps physical layer interface
中文描述： 1端口400 Mbps的物理層接口
文件頁數(shù)： 27/42頁
文件大?。?/td> 233K
代理商： PDI1394P25
Philips Semiconductors
Preliminary data
PDI1394P23
2-port/1-port 400 Mbps physical layer interface
2001 Sep 06
27
SV01758
LR0
LR1
LR2
LR3
LR(n–2)
LR(n–1)
Figure 14.
LREQ Request Stream
18.1
To request access to the bus, to read or write a PHY register, or to
control arbitration acceleration, the LLC sends a serial bit stream on
the LREQ terminal as shown in Figure 14.
LLC service request
The length of the stream will vary depending on the type of request
as shown in Table 11.
Table 11. Request Stream Bit Length
REQUEST TYPE
NUMBER OF BITS
Bus request
7 or 8
Read register request
9
Write register request
17
Acceleration control request
6
Regardless of the type of request, a start bit of 1 is required at the
beginning of the stream, and a stop bit of 0 is required at the end of
the stream. The second through fourth bits of the request stream
indicate the type of the request. In the descriptions below, bit 0 is the
most significant, and is transmitted first in the request bit stream.
The LREQ terminal is normally low.
Encoding for the request type is shown in Table 12.
Table 12. Request Type Encoding
LR1–LR3
NAME
DESCRIPTION
000
ImmReq
Immediate bus request. Upon
detection of idle, the PHY takes
control of the bus immediately
without arbitration
001
IsoReq
Isochronous bus request. Upon
detection of idle, the PHY arbitrates
for the bus without waiting for a
subaction gap.
010
PriReq
Priority bus request. The PHY
arbitrates for the bus after a
subaction gap, ignores the fair
protocol.
011
FairReq
Fair bus request. The PHY
arbitrates for the bus after a
subaction gap, follows the fair
protocol
100
RdReg
The PHY returns the specified
register contents through a status
transfer.
101
WrReg
Write to the specified register.
110
AccelCtl
Enable or disable asynchronous
arbitration acceleration.
Reserved.
111
Reserved
For a bus request the length of the LREQ bit stream is 7 or 8 bits, as
shown in Table 13.
Table 13. Bus Request
BIT(S)
NAME
DESCRIPTION
0
Start Bit
Indicates the beginning of the transfer
(always 1).
Indicates the type of bus request. See
Table 12.
Indicates the speed at which the PHY
will send the data for this request. See
Table 14 for the encoding of this field.
1–3
Request Type
4–6
Request Speed
7
Stop Bit
Indicates the end of the transfer
(always 0). If bit 6 is 0, this bit may be
omitted.
The 3-bit request speed field used in bus requests is shown in
Table 14.
Table 14. Bus Request Speed Encoding
LR4–LR6
DATA RATE
000
S100
010
S200
100
S400
All others
Invalid
NOTE:
The PDI1394P23 will accept a bus request with an invalid speed
code and process the bus request normally. However, during packet
transmission for such a request, the PDI1394P23 will ignore any
data presented by the LLC and will transmit a null packet.
For a read register request, the length of the LREQ bit stream is
9 bits as shown in Table 15.
Table 15. Read Register Request
BIT(S)
NAME
DESCRIPTION
0
Start Bit
Indicates the beginning of the transfer
(always 1).
A 100 indicating this is a read register
request.
Identifies the address of the PHY register
to be read.
Indicates the end of the transfer
(always 0).
1–3
Request Type
4–7
Address
8
Stop Bit
相關(guān)PDF資料
PDF描述
PDI1394P25BD 1-port 400 Mbps physical layer interface
PDI1394P25EC 1-port 400 Mbps physical layer interface
PDI1394P23BD 2-port/1-port 400 Mbps physical layer interface
PDI1394L41BE 8358 PBGA ENCRP NO-PB
PDI1394P21BE 3-port physical layer interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PDI1394P25BD 功能描述:輸入/輸出控制器接口集成電路 1394 1 PORT 400 MB/S PHY RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
PDI1394P25BD,118 制造商:NXP Semiconductors 功能描述:1394 1 PORT 400 MB/S PHY - Tape and Reel
PDI1394P25BD,151 制造商:NXP Semiconductors 功能描述:1394 1 PORT 400 MB/S PHY - Trays
PDI1394P25BD,157 功能描述:輸入/輸出控制器接口集成電路 1394 1 PORT 400 MB/S PHY RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
PDI1394P25BD-S 功能描述:IC IEEE 1394 LINK CTRLR 64LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*