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| 型号： | TUNAG001 |
| 厂商： | Microchip Technology |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | MODULE MEMS COMPASS SPI CM1015 |
| 标准包装： | 1 |
| 系列： | Unagi |
| 传感器类型： | 磁性，数字式罗盘 |
| 接口： | SPI |
| 电源电压： | 2.7 V ~ 4 V |
| 嵌入式： | 是 |
| 已供物品： | 模块，CD |
| 已用 IC / 零件： | CM1015 |
CM1015 COMPASS MODULE
UNAGI
NET L L C
Serial Communication
The CM1015 module uses simple 2-wire serial communication to send out the present direction data of the
module. The module acts as a Master data device, that outputs data and clock signals. Two control signals are
also available that control the ?ow of the data coming out of the module.
PIN
5
6
7
8
NAME
SREQ
SDONE
SDAT
SCLK
DIRECTION
INPUT
OUTPUT
OUTPUT
OUTPUT
FUNCTION
Serial Data Request, active low
Serial Data Done, active high
Serial Data
Serial Data Clock
SDAT, Serial Data -
This is the main serial data output pin.
SCLK, Serial Data Clock -
This is a clock signal that is used to indicate when the Serial Data is valid. The Serial Data is valid on the rising
edge of this Serial Data Clock pin.
SDONE, Serial Data Done - Active HIGH
When the entire packet of direction data has been clocked out of the module, this pin will go high to indicate that
the direction data packet has ?nished being output.
SREQ, Serial Data Request - Active HIGH
A high signal on the SREQ pin will tell the module that it should go acquire new direction data. This pin should be
HIGH for 10uS minimum.
The serial communication handshake ?ow is detailed out in the Timing Diagrams. The signal ordering is as
follows:
-
-
-
-
-
-
-
from idle condition : SDONE = HIGH, SREQ = LOW.
Take SREQ high; requests new data from module.
Wait for SDONE to go low.
SDONE goes low; new data will begin clocking out.
Take SREQ low; idle condition.
Wait for SDONE to go high; indicates all data has been clocked out.
SDONE is high; idle condition.
UNAGI NET LLC ? MOUNTAIN VIEW, CALIFORNIA
www.unagi.net ? techinfo@unagi.net
Version 0.91 - Jul 20, 2010 7
Advanced information-subject to change
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