KMA199E T/R NXP Semiconductors, KMA199E T/R Datasheet - Page 17

• Manufacturer Part Number: KMA199E T/R
• Manufacturer: NXP Semiconductors

Specifications of KMA199E T/R

• Operating Temperature (min): -40C
• Operating Supply Voltage (typ): 5V
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
KMA199E_1
Product data sheet
13.3.2 Read access
In order to read data from the sensor, the following procedure must be done:
Figure 14
data on the bus, which is either caused by the master or by the slave. The signals master
output enable and slave output enable just symbolize if the master or the slave output is
enabled or disabled respectively.
Fig 14. OWI read access
•
•
•
•
•
•
•
•
master
enable
enable
output
output
Start condition: The master drives a rising edge after a LOW level
Command: The master sends a read command, that is the last bit is set
Handover: The master sends a handover bit, that is a logic 0 and disables his output
after a three-quarter bit period
Takeover: The slave drives a LOW level after the falling edge for t
Data: The slave sends two data bytes
Handover: The slave sends a handover bit, that is a logic 0 and disables his output
after a three-quarter bit period
Takeover: The master drives a LOW level after the falling edge for t
Stop condition: The master drives a rising edge after a LOW level
slave
OWI
(1) Duration of LOW level for slave takeover t
(2) There is an overlap in the output enables of master and slave, because both drive a LOW level.
(3) Duration of LOW level for master takeover t
(4) If the master does not take the bus and a pull-up exists, the stop condition is generated by the
(5) If the master might not drive the bus, the bus is defined by the bus-pull.
However this ensures the independency from having a pull-up or pull-down on the bus. In
addition it improves the ElectroMagnetic Compatibility (EMC) robustness, because all levels
are actively driven.
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.
shows the read access of the digital interface. The signal OWI represents the
START
CMD7
Rev. 01 — 18 October 2007
CMD0
HANDSHAKE
(1)
(2)
tko(slv)
tko(mas)
.
RDATA15
.
RDATA0
Programmable angle sensor
HANDSHAKE
(3)
(2)
KMA199E
tko(slv)
tko(mas)
© NXP B.V. 2007. All rights reserved.
(4)
STOP
IDLE
001aag744
(5)
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