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參數資料
| 型號： | XRT86VL34_1 |
| 廠商： | Exar Corporation |
| 元件分類： | 通信及網絡 |
| 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： | 40/63頁 |
| 文件大?。?/td> | 402K |
| 代理商： | XRT86VL34_1 |
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XRT86VL34
37
QUAD T1/E1/J1 FRAMER/LIU COMBO - HARDWARE DESCRIPTION
REV. V1.2.0
WR
V12
I
-
Microprocessor Interface—Write Strobe Input
The exact behavior of this pin depends upon the type of Micro-
processor/Microcontroller the XRT86VL34 has been configured
to operate in, as defined by the PTYPE[2:0] pins.
Intel-Asynchronous Mode - WR* - Write Strobe Input:
This input pin functions as the WR* (Active Low WRITE Strobe)
input signal from the Microprocessor. Once this active-low sig-
nal is asserted, then the input buffers (associated with the Bi-
Directional Data Bus pin, D[7:0]) will be enabled.
The Microprocessor Interface will latch the contents on the Bi-
Directional Data Bus (into the “target” register or address loca-
tion, within the XRT86VL34) upon the rising edge of this input
pin.
Motorola-Asynchronous Mode - R/W* - Read/Write Opera-
tion Identification Input Pin:
This pin is functionally equivalent to the “R/W*” input pin. In the
Motorola Mode, a “READ” operation occurs if this pin is held at
a logic “1”, coincident to a falling edge of the RD/DS* (Data
Strobe) input pin. Similarly a WRITE operation occurs if this pin
is at a logic “0”, coincident to a falling edge of the RD/DS* (Data
Strobe) input pin.
Power PC 403 Mode - R/W* - Read/Write Operation Identifi-
cation Input:
This input pin will function as the “Read/Write Operation Identi-
fication Input” pin.
Anytime the Microprocessor Interface samples this input signal
at a logic low (while also sampling the CS* input pin “l(fā)ow”) upon
the rising edge of PCLK, then the Microprocessor Interface will
(upon the very same rising edge of PCLK) latch the contents of
the Address Bus (A[14:0]) into the Microprocessor Interface cir-
cuitry, in preparation for this forthcoming READ operation. At
some point (later in this READ operation) the Microprocessor
will also assert the DBEN*/OE* input pin, and the Microproces-
sor Interface will then place the contents of the “target” register
(or address location within the XRT86VL34 device) upon the
Bi-Directional Data Bus pins (D[7:0]), where it can be read by
the Microprocessor.
Anytime the Microprocessor Interface samples this input signal
at a logic high (while also sampling the CS* input pin a logic
“l(fā)ow”) upon the rising edge of PCLK, then the Microprocessor
Interface will (upon the very same rising edge of PCLK) latch
the contents of the Address Bus (A[14:0]) into the Microproces-
sor Interface circuitry, in preparation for the forthcoming WRITE
operation. At some point (later in this WRITE operation) the
Microprocessor will also assert the RD*/DS*/WE* input pin, and
the Microprocessor Interface will then latch the contents of the
Bi-Directional Data Bus (D[7:0]) into the contents of the “target”
register or buffer location (within the XRT86VL34).
MICROPROCESSOR INTERFACE
S
IGNAL
N
AME
B
ALL
#
T
YPE
O
UTPUT
D
RIVE
(
M
A)
D
ESCRIPTION
相關PDF資料 |
PDF描述 |
|---|---|
| XRT86VL34 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| XRT86VL34_2 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| XRT86VL34IB | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| XRT86VL38_2 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| XRT86VL38IB | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| XRT86VL34ES | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT86VL34IB | 功能描述:網絡控制器與處理器 IC 4 IND FULL DPLX FIFO TWO-FRAME, CAS, CCS RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT86VL34IB-F | 功能描述:網絡控制器與處理器 IC 4-Ch T1/E1/J1 RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT86VL38 | 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION |
| XRT86VL38_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER/LIU COMBO - E1 REGISTER DESCRIPTION |
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