uja1023 NXP Semiconductors, uja1023 Datasheet - Page 10

• Manufacturer Part Number: uja1023
• Description: Uja1023 Lin-i/o Slave
• Manufacturer: NXP Semiconductors

Philips Semiconductors
UJA1023_4
Product data sheet
Daisy chain NAD assignment:
frame and the type of configuration is daisy chain, the following actions can take place,
depending on the initial NAD value:
After the NAD assignment, for example, the ‘assign frame ID’ can be used to assign
specific ID numbers.
The internal pull-up resistors at pin C1 to C3 are active during the assign NAD process
only. Thus it causes no permanent current (see also
consumption especially in the low-power modes.
Remark: There is no slave response to assign NAD requests using the initial NAD 0x20
and NAD 0x23.
•
•
•
Initial NAD 0x20: Daisy chain on, the C1 to C3 pin drivers are enabled
Initial NAD 0x21: The input level on the configuration pin C1 and the status flag of the
internal DC-switch is read. The UJA1023 will be configured if C1 is LOW and the
DC-switch is open (see slave 2 in
configuration uses the data byte D7 as new NAD for its further LIN configuration
requests (e.g. Assign Frame ID). After the NAD assignment the DC-switch at pin C3 is
closed, which puts through the daisy chain signal to the next slave. The switch will be
opened again as soon as an Assign NAD request with initial NAD daisy chain off has
been received
Initial NAD 0x23: Daisy chain off, the C1 to C3 pin drivers are disabled
Rev. 04 — 5 July 2006
Once the UJA1023 receives the assign NAD MasterReq
Figure
4). The UJA1023 under daisy chain
Section
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
7.4) and reduces power
UJA1023
LIN-I/O slave
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