UJA1023T/2R04,512 NXP Semiconductors, UJA1023T/2R04,512 Datasheet - Page 27

• Manufacturer Part Number: UJA1023T/2R04,512
• Description: IC CAN/LIN I/O SLAVE 32HTSSOP
• Manufacturer: NXP Semiconductors

Specifications of UJA1023T/2R04,512

• Applications: LIN Controller
• Interface: LIN (Local Interconnect Network)
• Voltage - Supply: 6.5 V ~ 27 V
• Package / Case: 16-SOIC (3.9mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935281302512; UJA1023T/2R04; UJA1023T/2R04

NXP Semiconductors
UJA1023
Product data sheet
7.2.3.5 Switch matrix mode
The Cyclic sense mode can be configured via the Output mode bits OM0 and OM1 in the
configuration data bytes (see
TH3 will be used instead. This feature is used for diagnosis purposes to check the
presence of a switch with an integrated parallel resistor (typical value is 2800 Ω ± 1 %).
The switch can be detected by selecting first TH1 and then TH2.
All Px pins in Cyclic sense mode are sampled simultaneously. The Cyclic sense mode
timing is specified in
set and Sleep mode is entered when the Px pin is LOW. A wake-up will be issued when in
Sleep mode and the Px input level changes.
Figure 8
drive capability of the I/O-pins Px supports the use of a 4 × 4 switch matrix without extra
components. The I/O pins from P0 to P3 provide a weak but sufficient pull-up for switch
applications and the pins from P4 to P7 are used as strong pull-down in case a switch is
pushed.
The Switch matrix mode can be enabled for the I/O-pins Px via data byte D3 of the second
configuration data block (see
The data bits SM0 and SM1 configure P0 to P3 as an input with a weak but sufficient
pull-up for switch applications and P4 to P7 as strong pull-down in order to detect an
activated switch (see
In Normal mode when a valid sync break and sync field is received, automatically a matrix
scan starts:
Fig 7.
•
•
Immediately if the slave is not addressed
When addressed, after the LIN message is handled
switch at Px
external
capture
capture
PxOut
active
shows an application example of a 4 × 4 switch matrix with the UJA1023. The
edge
Cyclic sense mode
V
Px
All information provided in this document is subject to legal disclaimers.
t
sample
Section
t
Table
on
Rev. 5 — 17 August 2010
OPEN
18).
T
11. No wake-up will occur when the local wake-up mask is
Table
Table
cy
18).
16). In case threshold TH2 is selected then threshold
CLOSE
UJA1023
© NXP B.V. 2010. All rights reserved.
LIN-I/O slave
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