推 petition:yeah 10/14 23:17
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作者: vicjht (Little Monster) 看板: Eng-Class
標題: Re: [字辨] SPI-like
時間: Mon Oct 15 13:03:34 2007
※ 引述《CuckooBoy (書仔)》之銘言：
: SPI-like interface 後面的-like的意思是?
: 意思是........."類似" SPI 介面的意思?
應該是跟SPI有著相同結構
其實我也對這不是很了解
http://www.opencircuits.com/Dosonchip
這裡面有提到 請看有 # 的那一句
1. When using only one device on SPI, you should be able to leave the CS
signal in the active state at all times, also called "3 wire mode." The
DOSOnChip module (DOC for short) recommends that you wiggle this pin as part
of its communications protocol in noisy environments (more later).
2. In addition to the above signals, DOC requires that you monitor an
additional pins: BUSY.
3. DOC requires that you toggle the RESET pin to reset the device. It is
possible to put the module to sleep via SPI, but reawakening the device
requires that you disconnect power and reapply it. Even toggling the RESET
pin will not cause the device to wake up.
# So, the "SPI"-like interface consists of the following signals:
SCLK - clock. Must be toggled up and down to write or read a bit. (two
transitions per bit).
MISO - master in/slave (DOC) out
MOSI - master out/ slave (DOC) in
CS - ChipSelect
DIR - read only from master point-of-view. DOC sets this to 1 when it is
ready to receive data, and sets it to 0 when it has data to send.
BUSY - Read-only from master point of view. DOC sets this to 1 when it can't
be bothered to communicate.
RESET - used to reset or intialize the device.
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SPI-like interface 後面的-like的意思是?
意思是........."類似" SPI 介面的意思?
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