參數(shù)資料
型號： AM79C930
廠商： Advanced Micro Devices, Inc.
英文描述： PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
中文描述： PCnet -移動單芯片無線局域網(wǎng)媒體接入控制器
文件頁數(shù)： 115/161頁
文件大小： 691K
代理商： AM79C930
P R E L I M I N A R Y
AMD
115
Am79C930
TCR17: Baud Detect Lower Limit
This register is the Baud Detect Lower Limit
register (TCR17).
CONFIGURATION REGISTER INDEX:
11h
Bit
Name
Reset Value
Description
7–6
Reserved
–
Reserved. Must be written as a 0. Reads of this bit produce
undefined data.
Baud Detect Lower Limit. This register is used to program the lower
limit for the Baud detection circuit. The lower limit defines the short-
est time between like transitions (i.e., rising edge to rising edge or
falling edge to falling edge) that is expected for a given baud rate. If
like transitions are separated by values below this limit, then the
baud detect test for that pair of like transitions will fail.
Note that the rising edge baud counter will begin counting from 0
and when it reaches a value of 29, the next increment will cause the
counter to wrap to a value of 10 decimal. The falling edge baud
counter operates in an identical manner. Therefore, rising edges
that are separated by 20, 40, 60, 80, etc. CLKIN periods (with
CLKGT20=0 each baud tick is one CLKIN period, with
CLKGT20=1, each baud tick is two CLKIN periods) will all yield a
rising edge baud counter value of 20. The same is true for the falling
edge baud counter. This information should be used to appropri-
ately program the Baud Detect Lower Limit register.
The resolution of the value in this register is the period of the CLKIN
signal when the CLKGT20 bit of MIR9 is set to 0 or twice the period
of the CLKIN signal when the CLKGT20 bit of MIR9 is set to 1. With
CLKIN = 20 MHz and CLKGT20=0, a value of 14h (=20 decimal)
represents the nominalpulse width value for 1 Mbit/s network data
rate operation.
5–0
BDLLT[5:0]
00h
TCR18: Baud Detect Upper Limit.
This register is the Baud Detect Upper Limit register.
CONFIGURATION REGISTER INDEX:
12h
Bit
Name
Reset Value
Description
7–6
Reserved
–
Reserved. Must be written as a 0. Reads of this bit produce
undefined data.
Baud Detect Upper Limit. This register is used to program the upper
limit for the Baud detection circuit. The upper limit defines the long-
est time between like transitions (i.e., rising edge to rising edge or
falling edge to falling edge) that is expected for a given baud rate. If
like transitions are separated by values above this limit, then the
baud detect test for that pair of like transitions will fail.
Note that the rising edge baud counter will begin counting from 0
and when it reaches a value of 29, the next increment will cause the
counter to wrap to a value of 10 decimal. The falling edge baud
counter operates in an identical manner. Therefore rising edges
that are separated by 20, 40, 60, 80, etc. CLKIN periods (with
CLKGT20=0 each baud tick is one CLKIN period, with
CLKGT20=1, each baud tick is two CLKIN periods) will all yield a
rising edge baud counter value of 20. The same is true for the falling
5–0
BDULT[5:0]
00h
相關(guān)PDF資料
PDF描述
AM79C930VCW PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C940VCW Media Access Controller for Ethernet (MACE)
AM79C940 Media Access Controller for Ethernet (MACE)
AM79C940JCW Media Access Controller for Ethernet (MACE)
AM79C940KCW Media Access Controller for Ethernet (MACE)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C930EVAL-HW 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am79C930EVAL-HW - PCnet-Mobile Evaluation Kit
AM79C930VC/W 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C930VCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C940 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Media Access Controller for Ethernet (MACE)
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

*
*
*