參數(shù)資料
型號(hào)： MC33389ADH
廠商： MOTOROLA INC
元件分類： 網(wǎng)絡(luò)接口
英文描述： System Basis Chip with Low Speed Fault Tolerant CAN
中文描述： DATACOM, INTERFACE CIRCUIT, PDSO20
封裝： POWER, HSOP-20
文件頁數(shù)： 14/35頁
文件大小： 609K
代理商： MC33389ADH
MC33389
14
MC33389
SBC MODES
Table 8. NormalRequest: V1 active, V2&V3 passive
SBC Normal Mode
In this mode, V1 and V2 are active, V3 can be set active or
passive via the SPI. Therefore, the whole ECU can be
operated. Normal mode is entered by a SWCR register
configuration in NormalRequest mode.
Table 9. SBC Normal Mode: V1 And V2 Are Active. V3 Is
Active Or Passive
SBC Standby Mode
In this mode V1 is active, V2 is passive. V3 can be either
permanently active or permanently passive. This is a low
power mode with V1 active in order to have a fast reaction
time in case of any wake-up.
For standby mode, the SBC monitors the SW. It means the
microcontroller runs and is monitored and must serve a
watchdog trigger.
Table 10. Standby: V1 Active V2 Passive, V3 Active Or
Passive, Watchdog Is Active
Entering NormalRequest
Leaving NormalRequest
SBC reset just released
When firstly receiving the
SW timing word, SBC
goes to Normal
If time-out without receiving
SPI commands (75ms),
SBC goes to sleep
Entering Normal Mode
Leaving Normal Mode
By SPI command
By SPI command, going to
any other mode
After SWCR register
configuration in
NormalRequest mode
Watchdog time out, going
to NormalRequest after
activating Reset
V1 undervoltage detection,
going to NormalRequest
mode after activating Reset
Entering Standby
Leaving Standby
If SW time-out going to
NormalRequest after
microcontroller Reset
By SPI command
By SPI command going to
any other mode
V1 undervoltage detection,
going to NormalRequest
mode after activating Reset
External activation of the
RSTB pin
SBC Sleep Mode
This is a low power consumption mode. V1 and V2 are
disabled. V3 can be permanently disabled or cyclically active.
Table 11. SBC Sleep Mode: V1 And V2 Are Passive, V3
Passive Or Cyclic.
Emergency Mode
In case the microcontroller detects the ECU or the system
is not under control any more, it may decide to switch the SBC
to the Emergency mode. V1, V2, V3 will be passive and wake-
up are not detected. The only way to leave this mode is to
disconnect the ECU from the Battery voltage (BatFail
detection).
Table 12. SBC Emergency Mode: V1 And V2 V3 Are
Passive
Figure 13. Typical Behaviour At Power On
Note: In Normalrequest, if an SPI command is received
before the SW timing configuration (SWCR register), it will not
Entering Sleep Mode
Leaving Sleep Mode
If SW timing not configured
75ms after entering
NormalRequest mode
CAN wake-up, going to
NormalRequest
By SPI command
If a wake-up is detected with
cyclic sense
For MC33389ADW only: If
V1 is below V1 reset for
more than 100ms
If a wake-up is detected with
wake-up not connected to V3
(permanent sense)
Forced wake-up (See Forced
Wake up Section)
SPI wake-up (See Wake up
by SPI Section)
Entering Emergency Mode
Leaving Emergency Mode
By SPI command
SBC BatFail detection (Dis-
connection of the Battery
voltage)
ECU
connected
to battery
Reset
V1 low
NormalRequest
Sleep
Normal
V1 on
SPI SW
timing configuration
at t<75ms
No SPI SW
timing configuration
at t=75ms
(reset
released)
Emergency
SPI go to Emergency
at t<75ms
Vbat > 4V and V1 low for t>100ms for MC33389ADW only (A version)
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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