Product data

UJA1167 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 2 — 18 April 2014 10 of 60
NXP Semiconductors
UJA1167
Mini high-speed CAN system basis chip with Standby/Sleep modes &
watchdog
The UJA1167 switches from Reset mode to Forced Normal mode if bit FNMC = 1.
6.1.1.8 Hardware characterization for the UJA1167 operating modes
[1] When the SBC switches from Reset, Standby or Normal mode to Off mode, V1 behaves as a current source during power down while
V
BAT
is between 3 V and 2 V.
[2] Window mode is only active in Normal mode.
6.1.2 System control registers
The operating mode is selected via bits MC in the Mode control register. The Mode control
register is accessed via SPI address 0x01 (see Section 6.15
).
The Main status register can be accessed to monitor the status of the overtemperature
warning flag and to determine whether the UJA1167 has entered Normal mode after initial
power-up. It also indicates the source of the most recent reset event.
Table 3. Hardware characterization by functional block
Block Operating mode
Off Forced Normal Standby Normal Sleep Reset Overtemp
V1 off
[1]
on on on off on off
VEXT/INH off on determined by
bits VEXTC
and
VEXTSUC
(see Table 12
)
determined by bits
VEXTC and
VEXTSUC
determined by
bits VEXTC
and
VEXTSUC
determined
by bits
VEXTC and
VEXTSUC
VEXT off;
INH
unchanged
RSTN LOW HIGH HIGH HIGH LOW LOW LOW
SPI disabled active active active disabled disabled disabled
Watchdog off off determined by
bits WMC (see
Table 7
)
[2]
determined by bits
WMC
determined by
bits WMC
[2]
off off
CAN off Active Offline Active/ Offline/
Listen-only
(determined by bits
CMC; see Table 14
)
Offline Offline off
RXD V1 level CAN bit stream V1 level/LOW
if wake-up
detected
CAN bit stream if
CMC = 01/10/11;
otherwise same as
Standby/Sleep
V1 level/LOW
if wake-up
detected
V1
level/LOW if
wake-up
detected
V1
level/LOW if
wake-up
detected
Table 4. Mode control register (address 01h)
Bit Symbol Access Value Description
7:3 reserved R -
2:0 MC R/W mode control:
001 Sleep mode
100 Standby mode
111 Normal mode