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32-bit MCUs for under a dollar each
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32-bit MCUs for under a dollar each# EE - 电子工程
s*5
1
求助:国内一同事得了慢性粒细胞白血病,想来美国治疗,求我帮忙。请问:应该怎样
操作哪?我听说整个疗程要一到两年,她又没有医疗保险。谁有类似的经验,帮我出出
主意吧,多谢了!
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w*1
2
我的PD是8/28,比那些八月一号递的晚了一个月!还是收到了RFE!也就是说在整整一
个八月,移民局都在发RFE!根本没有改正他们的错误!或者说他们根本没意识到他们
错了。
在这样下去,我们的申请要么被拒绝,要么被长时间搁置。我们必须行动了。
我呼吁一下大家给出具体的方法,我们所有人一起行动,包括写信给议员,打电话之类
,我们一定要让移民局正视这个问题。再不行动,90天以后会出现什么情况,我们都无
法预计。
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h*y
3
待遇:一个单300-600,3天内完成。另有不同单子。
要求:有一定网站建设经验优先;
地点:灵活,可兼职
请联系BAC广告推广客服QQ2293465036 注明“网站设计” 并准备好个人简历。
avatar
l*y
4
OPT快要过期了,太担心了。
自己来MITBBS的时间很短,所以在这里的network很薄弱, but please believe me I
am a good person.
简单的介绍一下:
会计master,学TAX。
有10个月的实习和工作经验。
麻烦从事会计的JMDXs,能否有人帮我推荐一份工作。地点希望在Dallas(因为family
的原因自己刚来Dallas不久)。
如果有什么要求,请给我站内信箱联系。非常感谢。
I desperately need a job. Any words will be greatly appreciated.
avatar
f*0
5
I just received 30 32bit mcus. those are 50mhz parts, 32bit risc mcus
running at 50mhz, 32k flash / 8k sram, one channel of ssi, one channel of
i2c, 8 channels of 10-bit adc running at 1 million samples per second.
60mips and 100mw in power dissipation.
for those chips, I paid more for shipping than for the chips themselves.
whoever is still programming 8/16 bit mcus must be concerned because their
days are numbered.
avatar
t*n
6
想明白为啥要来美治疗先

【在 s********5 的大作中提到】
: 求助:国内一同事得了慢性粒细胞白血病,想来美国治疗,求我帮忙。请问:应该怎样
: 操作哪?我听说整个疗程要一到两年,她又没有医疗保险。谁有类似的经验,帮我出出
: 主意吧,多谢了!

avatar
b*e
7
我的RFE response review已经一个月多了,infopass的话也要等到一个月后,也没有
National Benefits Center的邮件地址,打电话后也只是被告知说等一等,60天内才有
结果。
avatar
c*a
9

I
family

【在 l********y 的大作中提到】
: OPT快要过期了,太担心了。
: 自己来MITBBS的时间很短,所以在这里的network很薄弱, but please believe me I
: am a good person.
: 简单的介绍一下:
: 会计master,学TAX。
: 有10个月的实习和工作经验。
: 麻烦从事会计的JMDXs,能否有人帮我推荐一份工作。地点希望在Dallas(因为family
: 的原因自己刚来Dallas不久)。
: 如果有什么要求,请给我站内信箱联系。非常感谢。
: I desperately need a job. Any words will be greatly appreciated.

avatar
w*i
10
I am not a professional in MCUs, but are you sure of your conclusion? How is
the cost to replace old systems designed with 8/16 bit MCUs, including
hardware redesign, software reprogram, system retest and perphaps FDA
approval reapply? If old systems function well, do you think designers and
managers will bother to use alternatives?
Think technically, but act practically.

【在 f*****0 的大作中提到】
: I just received 30 32bit mcus. those are 50mhz parts, 32bit risc mcus
: running at 50mhz, 32k flash / 8k sram, one channel of ssi, one channel of
: i2c, 8 channels of 10-bit adc running at 1 million samples per second.
: 60mips and 100mw in power dissipation.
: for those chips, I paid more for shipping than for the chips themselves.
: whoever is still programming 8/16 bit mcus must be concerned because their
: days are numbered.

avatar
s*5
11
唉,这病在国内基本上是绝症了,他们就是希望,在美国治愈率能高些。
avatar
l*9
12
我也准备约infopass了

★ 发自iPhone App: ChineseWeb 7.8

【在 b*****e 的大作中提到】
: 我的RFE response review已经一个月多了,infopass的话也要等到一个月后,也没有
: National Benefits Center的邮件地址,打电话后也只是被告知说等一等,60天内才有
: 结果。

avatar
c*n
13
poplol

发布于: 2014/07/17 11:48 am
大家不要相信这个骗子!做好了网站不给钱!!
举报
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y*0
14
I cannot help you, but hope you can find a job very soon. Good luck!
avatar
p*y
15

How is
including
and
so you think there is no market for mcu other than for replacement
purposes?
the annual sales volume for mcu is about 6 billion units and $15
billion. with about 100 - 200k people employed in their design,
engineering and manufacturing.
do you think they all sit around and work on how to replace those old
mcus?
Think rationally, but act strategically.

【在 w**i 的大作中提到】
: I am not a professional in MCUs, but are you sure of your conclusion? How is
: the cost to replace old systems designed with 8/16 bit MCUs, including
: hardware redesign, software reprogram, system retest and perphaps FDA
: approval reapply? If old systems function well, do you think designers and
: managers will bother to use alternatives?
: Think technically, but act practically.

avatar
t*n
16
貌似目前只有骨髓移植有治愈可能
那是不是该先在国内的骨髓库找配型
找不着再进一步上国际骨髓库查

【在 s********5 的大作中提到】
: 唉,这病在国内基本上是绝症了,他们就是希望,在美国治愈率能高些。
avatar
h*8
17
watermark801, 谢谢你的呼吁,完全支持!
我和bypassus也都发了贴号召此事。
我又仔细看了一下移民局网站about一栏,里面虽然有各部门介绍,但找到的联系方式
只有两个。
一个是customer service, 打了没有用的,因为representative是按Customer Service
Reference Guide回答问题,那个guide 在移民局网站about 一栏中electronic
reading room中可以找到,非常basic, 根本回答不了我们的问题。这就是为什么
bypassus说representative说话好像机器。Representative不具备全面理解和解释移民
法的能力,其实很多local office的人也没有这个能力。他们有时还不如我们懂得多。
另一个电话是投诉电话,可在electronic reading room栏下的Report USCIS
Misconduct中找到,但这个电话是接收有关uscis employee行为举止不当的,和我们要
反映的事情没有关系。
bigtime,移民局网站要求的约infopass的程序很多很慢,其实以我去local office的经
历看,有很多walk in 问问题的。你是找不到NBC联系方式的,除了上面那两个电话,
什么USCIS的联系方式也找不到。Service center 也不让walk in.
avatar
l*y
18
Thank you, yh00!
Wish everyone have a happy new year and every dream come true.
新春愉快,万事如意!!
avatar
w*i
19
I did not say there is no market for 32 bit MCUs. In my previous post, I
just gave an example which might possibly shake your conclusion. Take a
detailed example, say an Orman blood pressure monitor, which is quite
popular in Market. Do you think it is necessary to add fancy functions with
32 bits MCUS for the current products if you were the CEO of Orman? If there
is any improvement needed to be done in their system, modification is
enough. That is the reason I believe it is a long run before 8

【在 p**********y 的大作中提到】
:
: How is
: including
: and
: so you think there is no market for mcu other than for replacement
: purposes?
: the annual sales volume for mcu is about 6 billion units and $15
: billion. with about 100 - 200k people employed in their design,
: engineering and manufacturing.
: do you think they all sit around and work on how to replace those old

avatar
w*1
20
我觉得投诉电话可以打,由于他们严重失职,导致从八月到现在几乎所有的F2A申请被
delay,想想到底有多少人受到影响。这难道还不能投诉?至少通过这个渠道,能够
make noise,让他们的top manager知道这件事。另外我们可以联合各个移民律师事务
所,因为这次的事件,对他们也有很大的影响。律师和IO打交道的经验比我们多。而且
有些律师和IO很熟,或者有以外的帮助。总之我们要尽快找出一个办法,然后联合行动
。我觉得我们可以开个微信群或者QQ群来联系这个事情。

Service

【在 h*****8 的大作中提到】
: watermark801, 谢谢你的呼吁,完全支持!
: 我和bypassus也都发了贴号召此事。
: 我又仔细看了一下移民局网站about一栏,里面虽然有各部门介绍,但找到的联系方式
: 只有两个。
: 一个是customer service, 打了没有用的,因为representative是按Customer Service
: Reference Guide回答问题,那个guide 在移民局网站about 一栏中electronic
: reading room中可以找到,非常basic, 根本回答不了我们的问题。这就是为什么
: bypassus说representative说话好像机器。Representative不具备全面理解和解释移民
: 法的能力,其实很多local office的人也没有这个能力。他们有时还不如我们懂得多。
: 另一个电话是投诉电话,可在electronic reading room栏下的Report USCIS

avatar
a*l
21
why do you think programming/using 8/16 or 32bit mcu is so different that
those people now working on 8/16 mcu will have huge difficulty moving to
32bit mcu?

【在 f*****0 的大作中提到】
: I just received 30 32bit mcus. those are 50mhz parts, 32bit risc mcus
: running at 50mhz, 32k flash / 8k sram, one channel of ssi, one channel of
: i2c, 8 channels of 10-bit adc running at 1 million samples per second.
: 60mips and 100mw in power dissipation.
: for those chips, I paid more for shipping than for the chips themselves.
: whoever is still programming 8/16 bit mcus must be concerned because their
: days are numbered.

avatar
h*8
22
你可以打个投诉电话试试,看看他们工作程序是怎样的。
如果你的申请是律师帮忙的,律师们现在怎么看这个问题,怎么行动的?
avatar
r*d
23
绝大大多数字信号处理16位就够了.
对等情况下32位的功耗肯定高一截,未必是好的选择.

【在 f*****0 的大作中提到】
: I just received 30 32bit mcus. those are 50mhz parts, 32bit risc mcus
: running at 50mhz, 32k flash / 8k sram, one channel of ssi, one channel of
: i2c, 8 channels of 10-bit adc running at 1 million samples per second.
: 60mips and 100mw in power dissipation.
: for those chips, I paid more for shipping than for the chips themselves.
: whoever is still programming 8/16 bit mcus must be concerned because their
: days are numbered.

avatar
f*0
24
"把part # 贴出来看看,1MSp/s,其他外设这个价位相当好。"
quite a few parts from luminary / ti do that.
avatar
f*0
25

so if a statement doesn't work for one example, the statement doesn't
work?
think rationally, and act intelligently.

【在 w**i 的大作中提到】
: I did not say there is no market for 32 bit MCUs. In my previous post, I
: just gave an example which might possibly shake your conclusion. Take a
: detailed example, say an Orman blood pressure monitor, which is quite
: popular in Market. Do you think it is necessary to add fancy functions with
: 32 bits MCUS for the current products if you were the CEO of Orman? If there
: is any improvement needed to be done in their system, modification is
: enough. That is the reason I believe it is a long run before 8

avatar
f*0
26

that
why do you think that I think that way?

【在 a****l 的大作中提到】
: why do you think programming/using 8/16 or 32bit mcu is so different that
: those people now working on 8/16 mcu will have huge difficulty moving to
: 32bit mcu?

avatar
f*0
27

I don't think performance is the reason for the proliferation of low-end
32-bit devices. obviously it helps. take a software-based vga display
for example. at 480 bit horizontal resolution, and 2 instructions per
second (to load up data), you need a mcu capable of 480*2/25us = 40mips.
that translates into a 160mhz PIC 8bit mcu - it doesn't exist. a 50mhz
32bit cortex-m3 chip (capable of 60mips+) can easily do that.
what will drive people to 32bit mcus is easier software development: the
ability

【在 r*****d 的大作中提到】
: 绝大大多数字信号处理16位就够了.
: 对等情况下32位的功耗肯定高一截,未必是好的选择.

avatar
a*l
28
so what did you mean "whoever is still programming 8/16 bit mcus must be
concerned because their days are numbered."? My understanding is that they
might change to 32bit or even 64bit later at any time, when the application
requires such a switch.

【在 f*****0 的大作中提到】
:
: I don't think performance is the reason for the proliferation of low-end
: 32-bit devices. obviously it helps. take a software-based vga display
: for example. at 480 bit horizontal resolution, and 2 instructions per
: second (to load up data), you need a mcu capable of 480*2/25us = 40mips.
: that translates into a 160mhz PIC 8bit mcu - it doesn't exist. a 50mhz
: 32bit cortex-m3 chip (capable of 60mips+) can easily do that.
: what will drive people to 32bit mcus is easier software development: the
: ability

avatar
p*a
29
业界一般只会考虑适用性,提供50%的冗余就行了,太好的芯片可能需要新的平台,新
的开发工具,更复杂的调试设备。还有很重要的一点是老的8/16位的芯片可以用插座,
4层甚至双面板,这32位的至少得4面贴,甚至BGA,低功耗意味着多路电源供应,至少6
层板才能把信号走出去,这贴装测试的成本也不低。除非做独立的可替换控制模块,但
这模块的接口插座费用和可靠性都少不了。总之适用就好
avatar
r*d
30

能做到多少个MIPS和bitwidth又没有直接关系, 市场上也有几百个MIPS的16bit
的DSP(可以用SIMD提高处理能力). 关键还是看需要, 有多少定点算法需要32位的精度?
功率就是和bitwidth和MHZ成正比的 (相同条件下, 不同处理器就不是
apple to apple比较了), 你还能举出反例出来?
据我所知Cortex虽然处理比arm7强一截,不过MIPS/mW 性能反而差了.

【在 f*****0 的大作中提到】
:
: I don't think performance is the reason for the proliferation of low-end
: 32-bit devices. obviously it helps. take a software-based vga display
: for example. at 480 bit horizontal resolution, and 2 instructions per
: second (to load up data), you need a mcu capable of 480*2/25us = 40mips.
: that translates into a 160mhz PIC 8bit mcu - it doesn't exist. a 50mhz
: 32bit cortex-m3 chip (capable of 60mips+) can easily do that.
: what will drive people to 32bit mcus is easier software development: the
: ability

avatar
f*0
31

they
application
what I meant is exactly what I wrote: whoever is still programming 8/16
bit mcus must be concerned because their days are numbered.

【在 a****l 的大作中提到】
: so what did you mean "whoever is still programming 8/16 bit mcus must be
: concerned because their days are numbered."? My understanding is that they
: might change to 32bit or even 64bit later at any time, when the application
: requires such a switch.

avatar
f*0
32

少6
through-holes are in general more expensive to manufacture than smd.
through-holes are great for experimenting though.
many of the newer chips have onboard regulators so they don't need
multiple power supplies - the ones requiring rtc may be an exception.
with 2ma or 4ma ports, you will have no problem running at 50mhz.

【在 p******a 的大作中提到】
: 业界一般只会考虑适用性,提供50%的冗余就行了,太好的芯片可能需要新的平台,新
: 的开发工具,更复杂的调试设备。还有很重要的一点是老的8/16位的芯片可以用插座,
: 4层甚至双面板,这32位的至少得4面贴,甚至BGA,低功耗意味着多路电源供应,至少6
: 层板才能把信号走出去,这贴装测试的成本也不低。除非做独立的可替换控制模块,但
: 这模块的接口插座费用和可靠性都少不了。总之适用就好

avatar
f*0
33

度?
name a few 8/16 bit mcus capable of 几百个MIPS.
that's true because most of the power consumption in a cmos chip comes
from charging up and discharging gate capacitance.
agree. That's why i was quite puzzled when someone wrote the following.
绝大大多数字信号处理16位就够了.
对等情况下32位的功耗肯定高一截,未必是好的选择.
there are plenty of data on that so you don't have to guess.
But before you set out doing anything, I just wanted to point out for
you that your 所知 is wrong. but you can find facts if you want to see
for yourself.

【在 r*****d 的大作中提到】
:
: 能做到多少个MIPS和bitwidth又没有直接关系, 市场上也有几百个MIPS的16bit
: 的DSP(可以用SIMD提高处理能力). 关键还是看需要, 有多少定点算法需要32位的精度?
: 功率就是和bitwidth和MHZ成正比的 (相同条件下, 不同处理器就不是
: apple to apple比较了), 你还能举出反例出来?
: 据我所知Cortex虽然处理比arm7强一截,不过MIPS/mW 性能反而差了.

avatar
f*0
34

true. they did a good job marketing the cortex-m3 architecture to compete
with the 8/16 bit mcus.
I am moving up from the pic world, and struggled with the arm7's way of
setting / clearing the gpio. and the bit banding on the cortex-m3 is a big
help for me.
they have a pretty good portfolio now and covers pretty much anything that
a typical 8/16bit mcu can do.
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