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參數(shù)資料
| 型號： | AM7992B |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Serial Interface Adapter (SIA) |
| 中文描述： | 串行接口適配器（新航） |
| 文件頁數(shù)： | 1/27頁 |
| 文件大小： | 224K |
| 代理商： | AM7992B |
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FINAL
Publication#
03378
Issue Date:
May 1993
Rev:
I
Amendment/
0
1
Am7992B
Serial Interface Adapter (SIA)
DISTINCTIVE CHARACTERISTICS
I
Compatible with lEEE 802.3/Ethernet/Cheapernet
specifications
I
Crystal/TTL oscillator-controlled Manchester
encoder
I
Manchester decoder acquires clock and data
within four bit times with an accuracy of
I
Guaranteed carrier and collision detection
squelch threshold limits
— Carrier/collision detected for inputs greater than
–275 mV
— No carrier/collision for inputs less than –175 mV
±
3 ns
I
Input signal conditioning rejects transient noise
— Transients <10 ns for collision detector inputs
— Transients <20 ns for carrier detector inputs
Receiver decodes Manchester data with worst
case
±
19 ns of clock jitter (at 10 MHz)
TTL-compatible host interface
Transmit accuracy +0.01% (without adjustments)
I
I
I
GENERAL DESCRIPTION
The Am7992B Serial Interface Adapter (SIA) is a
Manchester encoder/decoder compatible with IEEE
802.3, Cheapernet, and Ethernet specifications. In an
IEEE 802.3/Ethernet application, the Am7992B inter-
faces the Am7990 Local Area Network Controller for
Ethernet (LANCE) to the Ethernet transceiver device,
acquires clock and data within four bit times, and de-
codes Manchester data with worst case
jitter at 10 MHz. SIA provides both guaranteed signal
threshold limits and transient noise suppression cir-
cuitry in both data and collision paths to minimize false
start conditions.
±
19 ns phase
BLOCK DIAGRAM
03378I-1
Manchester
Decoder
Data
Receiver
Noise
Reject
Filter
Carrier
Detect
Noise
Reject
Filter
Collision
Detect
Manchester
Encoder
Crystal
OSC
Receive Data (RX)
Receive Clock (RCLK)
Carrier Present (RENA)
Collision (CLSN)
Transmit Data (TX)
Transmit Enable (TENA)
Transmit Clock (TCLK)
20 MHz
XTAL
1
XTAL
2
Receive+
Receive–
Collision+
Transmit+
Transmit–
Collision–
C
T
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM7992BDC | Serial Interface Adapter (SIA) |
| AM7992BDCB | Serial Interface Adapter (SIA) |
| AM7992BJC | Serial Interface Adapter (SIA) |
| AM7992BJCB | Serial Interface Adapter (SIA) |
| AM7996DC | IEEE 802.3/Ethernet/Cheapernet Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM7992B/BLA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Communications Interface |
| AM7992BDC | 制造商:Advanced Micro Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AM7992BDCB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Serial Interface Adapter (SIA) |
| AM7992BDMB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Communications Interface |
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