參數(shù)資料
型號： XRT86VL38_1
廠商： Exar Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 43/66頁
文件大小： 425K
代理商： XRT86VL38_1
XRT86VL38
40
REV. V1.2.0
OCTAL T1/E1/J1 FRAMER/LIU COMBO - HARDWARE DESCRIPTION
MICROPROCESSOR INTERFACE
S
IGNAL
N
AME
420 P
KG
B
ALL
#
484P
KG
B
ALL
#
T
YPE
O
UTPUT
D
RIVE
(
M
A)
D
ESCRIPTION
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
Y26
W24
T25
T26
P24
N25
N24
M25
T19
U20
P21
N18
M22
M20
M21
L21
I/O
8
Bidirectional Microprocessor Data Bus
These pins are used to drive and receive data over the bi-
directional data bus, whenever the Microprocessor per-
forms READ or WRITE operations with the Microprocessor
Interface of the XRT86VL38 device.
When DMA interface is enabled, these 8-bit bidirectional
data bus is also used by the T1/E1 Framer or the external
DMA Controller for storing and retrieving information.
REQ0
AB26
U19
O
8
DMA Cycle Request Output—DMA Controller 0 (Write)
:
These output pins are used to indicate that DMA transfers
(Write) are requested by the T1/E1 Framer.
On the transmit side (i.e., To transmit data from external
DMA controller to HDLC buffers within the XRT86VL38),
DMA transfers are only requested when the transmit buffer
status bits indicate that there is space for a complete mes-
sage or cell.
The DMA Write cycle starts by T1/E1 Framer asserting the
DMA Request (REQ0) ‘low’, then the external DMA control-
ler should drive the DMA Acknowledge (ACK0) ‘low’ to indi-
cate that it is ready to start the transfer. The external DMA
controller should place new data on the Microprocessor
data bus each time the Write Signal is Strobed low if the
WR is configured as a Write Strobe. If WR is configured as
a direction signal, then the external DMA controller would
place new data on the Microprocessor data bus each time
the Read Signal (RD) is Strobed low.
The Framer asserts this output pin (toggles it "Low") when
at least one of the Transmit HDLC buffers are empty and
can receive one more HDLC message.
The Framer negates this output pin (toggles it “High”) when
the HDLC buffer can no longer receive another HDLC mes-
sage.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT86VL38ES 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT86VL38ES484 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT86VL38IB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 8 IND FULL DPLX FIFO TWO-FRAME CAS CCS RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT86VL38IB484 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 8 IND FULL DPLX FIFO TWO-FRAME CAS CCS RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT86VL38IB484-F 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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