參數(shù)資料
型號(hào)： KMA210
廠商： NXP Semiconductors N.V.
元件分類： 振動(dòng)和傾斜傳感器
英文描述： Programmable angle sensor
封裝： KMA210<SOT1288|<<<1<Always Pb-free,;
文件頁(yè)數(shù)： 20/36頁(yè)
文件大?。?/td> 563K
代理商： KMA210
KMA210
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 30 June 2011
20 of 36
NXP Semiconductors
KMA210
Programmable angle sensor
13.3.2
Read access
To read data from the sensor, the following procedure must be performed:
1. Start condition: The master drives a rising edge after a LOW level
2. Command: The master sends a read command (CMD0 = 1)
3. Handover: The master sends a handover bit, that is a logic 0 and disables the output
after a three-quarter bit period
4. Takeover: The slave drives a LOW level after the falling edge for t
tko(slv)
5. Data: The slave sends two data bytes
6. Handover: The slave sends a handover bit, that is a logic 0 and disables the output
after a three-quarter bit period
7. Takeover: The master drives a LOW level after the falling edge for t
tko(mas)
8. Stop condition: The master drives a rising edge after a LOW level
Figure 16
shows the read access of the digital interface. The signal OWI represents the
data on the bus from the master or slave. The signals: master output enable and slave
output enable indicate when the master or the slave output is enabled or disabled,
respectively.
(1) Duration of LOW level for slave takeover t
tko(slv)
.
(2) There is an overlap in the output enables of master and slave, because both drive a LOW level.
However this ensures the independency from having a pull-up or pull-down on the bus. In addition
it improves the EMC robustness, because all levels are actively driven.
(3) Duration of LOW level for master takeover t
tko(mas)
.
(4) If the master does not take over and a pull-up exists, the stop condition is generated by the pull-up.
Otherwise a time-out is generated if there is a pull-down and the slave waits for a rising edge as
start condition.
(5) If the master does not drive the bus, the bus is defined by the bus-pull.
Fig 16. OWI read access
001aag744
master
output
enable
slave
output
enable
START
CMD7
CMD0
RDATA0
(1)
(2)
(2)
(4)
(5)
(3)
HANDSHAKE
HANDSHAKE
RDATA15
IDLE
STOP
OWI
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