mc33889 Freescale Semiconductor, Inc, mc33889 Datasheet - Page 37

• Manufacturer Part Number: mc33889
• Description: System Basis Chip With Low Speed Fault Tolerant Can Interface
• Manufacturer: Freescale Semiconductor, Inc

Table 7. 33889 Table of Operations
Analog Integrated Circuit Device Data
Freescale Semiconductor
MODE
100 ms
The table below describe the SBC operation modes.
1
State machine description:
“Nostop” means Nostop bit = 1
“! Nostop” means Nostop bit = 0
“BATFAIL” means Batfail bit = 1
“! BATFAIL” means Batfail bit = 0
“VDD1 over temperature” means VDD1 thermal shutdown occurs
“VDD1 low” means VDD1 below reset threshold
“VDD1 low > 100 ms” means VDD1 below reset threshold for more than
“W/D: Trigger” means TIM1 register write operation.
VSUP > BFew means VSUP > Battery Fall Early Warning (6.1 V typical)
Power
Down
2
Sleep
3
Reset
4
denotes priority
(VDD1 high temperature OR (VDDd1 low > 100 ms & VSUP >BFew)) & Nostop & !BATFAIL
VOLTAGE
REGULATOR
HS1 SWITCH
HS1 OFF or cyclic
VDD1: OFF
V2: OFF
Reset
(1 ms) expired
VDD1 low OR W/D: time
out 350 ms & !Nostop
counter
State Machine (not valid in debug modes)
Figure 16. Simplified State Machine
WAKE-UP
CAPABILITIES
(IF ENABLED)
W/D: timeout OR VDD1 low
CAN (always enable
Forced Wake-up
W/D: timeout OR VDD1 low
SPI and L0,L1
1
Cyclic sense
1
Normal Request
Wake-up
Stop
2
2
expired, or W/D written in incorrect time window if window W/D selected
(except stop mode). In normal request mode timeout is 355 ms p2.2 (350 ms
p3)ms.
consecutively.
RESET PIN
“W/D: timeout” means TIM1 register not written before W/D timeout period
“SPI: Sleep” means SPI write command to MCR register, data sleep
“SPI: Stop” means SPI write command to MCR register, data stop
“SPI: Normal” means SPI write command to MCR register, data normal
“SPI: Standby” means SPI write command to MCR register, data standby
Note 1: these 2 SPI commands must be send in this sequence and
Note 2: if W/D activated
W/D: timeout & Nostop & !BATFAIL
4
Low
SPI: Stop &
low
transition
3
SPI: standby &
W/D
(note1)
to
INT
high
trigger
CS
Not active
Normal
FUNCTIONAL DEVICE OPERATION
Standby
1
SOFTWARE
WATCHDOG
No Running
1
OPERATIONAL MODES
Sleep
CAN CELL
Term Vbat.
33889
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