uja1069 NXP Semiconductors, uja1069 Datasheet - Page 8

• Manufacturer Part Number: uja1069
• Description: Lin Fail-safe System Basis Chip
• Manufacturer: NXP Semiconductors

NXP Semiconductors
UJA1069_3
Product data sheet
Fig 4. Main state diagram
watchdog
trigger
INH/LIMP: HIGH/LOW/float
LIN: all modes available
INH/LIMP: LOW/float
watchdog: window
via SPI successful
watchdog: start-up
init Normal mode
Normal mode
Restart mode
EN: HIGH/LOW
SYSINH: HIGH
SYSINH: HIGH
LIN: off-line
EN: LOW
V1: ON
V1: ON
OR RSTN released and V1 undervoltage detected
OR RSTN released and V1 undervoltage detected
mode change via SPI
flash entry enabled (111/001/111 mode sequence)
OR mode change to Sleep with pending wake-up
via SPI successful
OR RSTN falling edge detected
OR RSTN falling edge detected
init Normal mode
OR illegal Mode register code
OR illegal Mode register code
OR SPI clock count
OR SPI clock count
OR watchdog not properly served
OR interrupt ignored
mode change via SPI
OR RSTN falling edge detected
OR V1 undervoltage detected
OR illegal Mode register code
supply connected
t
t
for the first time
t
t
WD(init)
WD(init)
watchdog
trigger
16
16
Rev. 03 — 10 September 2007
t
RSTN(INT)
OR watchdog time-out with watchdog timeout interrupt disabled
INH/LIMP: HIGH/LOW/float
INH/LIMP: HIGH/LOW/float
watchdog: time-out/OFF
mode change via SPI
OR watchdog OFF and I
SYSINH: HIGH/float
wake-up detected with its wake-up interrupt disabled
watchdog: start-up
Fail-safe mode
Standby mode
wake-up detected
Start-up mode
AND oscillator ok
INH/LIMP: LOW
EN: HIGH/LOW
OR mode change to Sleep with pending wake-up
SYSINH: HIGH
SYSINH: HIGH
watchdog: OFF
RSTN: LOW
LIN: off-line
LIN: off-line
LIN: off-line
AND t
EN: LOW
EN: LOW
V1: OFF
V1: ON
V1: ON
OR interrupt ignored
OR RSTN falling edge detected
OR V1 undervoltage detected
OR illegal Mode register code
t
ret
V1
I
OR interrupt ignored
thH(V1)
OR RSTN falling edge detected
OR V1 undervoltage detected
OR illegal Mode register code
t
RSTN(INT)
leave Flash mode code
OR watchdog time-out
with reset option
OR RSTN externally clamped HIGH detected
OR RSTN externally clamped LOW detected
OR V1 undervoltage detected
OR V3 overload detected
OR watchdog time-out
AND flash entry enabled
wake-up detected
init Flash mode via SPI
mode change via SPI
t
RSTN(INT)
LIN fail-safe system basis chip
oscillator fail
t
V1(CLT)
INH/LIMP: HIGH/LOW/float
watchdog: time-out/OFF
LIN: all modes available
INH/LIMP: LOW/float
SYSINH: HIGH/float
watchdog: time-out
EN: HIGH/LOW
SYSINH: HIGH
Sleep mode
Flash mode
UJA1069
RSTN: LOW
LIN: off-line
© NXP B.V. 2007. All rights reserved.
t
EN: LOW
t
RSTN(CLT)
V1: OFF
RSTN(CHT)
001aad670
V1: ON
from any
watchdog
mode
trigger
8 of 64