TJA1043 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
Product data sheet Rev. 6 — 10 November 2017 6 of 32
NXP Semiconductors
TJA1043
High-speed CAN transceiver
TJA1041A with improved EMC and ESD capability and quiescent current performance.
Improved slope control and high DC handling capability on the bus pins provide additional
application flexibility.
7.1 Operating modes
The TJA1043 supports five operating modes. Control pins STB_N and EN are used to
select the operating mode. Switching between modes allows access to a number of
diagnostics flags via pin ERR_N. Table 4
describes how to switch between modes.
Figure 4
illustrates the mode transitions when V
CC
, V
IO
and V
BAT
are valid.
[1] Setting the UV
NOM
flag will clear the WAKE flag.
[2] Setting the Wake flag will clear the UV
NOM
flag.
[3] A LOW-to-HIGH transition on pin STB_N will clear the UV
NOM
flag
[4] After the minimum hold time, in Go-to-Sleep mode, t
h(min)
, the transceiver will enter Sleep mode and pin
INH will be set floating.
Table 4. Operating mode selection
Internal flags Control pins Operating mode Pin INH
UV
NOM
[1]
UV
BAT
Wake
[2]
STB_N
[3]
EN
From Normal, Listen-only, Standby and Go-to-Sleep modes
set X X X X Sleep mode floating
cleared set X HIGH X Standby mode HIGH
cleared X set LOW X Standby mode HIGH
cleared X cleared LOW LOW Standby mode HIGH
cleared X cleared LOW HIGH Go-to-Sleep mode
[4]
HIGH
[4]
cleared cleared X HIGH LOW Listen-only mode HIGH
cleared cleared X HIGH HIGH Normal mode HIGH
From Sleep mode
set X X X X Sleep mode floating
cleared set X HIGH X Standby mode HIGH
cleared X set LOW X Standby mode HIGH
cleared X cleared LOW X Sleep mode floating
cleared cleared X HIGH LOW Listen-only mode HIGH
cleared cleared X HIGH HIGH Normal mode HIGH
