LOGIC COMMANDS AND REGISTERS Fault tolerant" />
參數(shù)資料
型號: MC33889DDW
廠商: Freescale Semiconductor
文件頁數(shù): 40/59頁
文件大?。?/td> 0K
描述: IC SYSTEM BASE W/CAN 28-SOIC
標準包裝: 26
控制器類型: 系統(tǒng)基礎(chǔ)芯片
接口: CAN
電源電壓: 5.5 V ~ 18 V
電流 - 電源: 45mA
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應商設(shè)備封裝: 28-SOIC W
包裝: 管件
Analog Integrated Circuit Device Data
Freescale Semiconductor
45
33889
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Fault tolerant CAN transceiver extended modes
By setting CEXT to 1 the transceiver cell supports sub bus communication
Note: if DFIS bit is set to 1, WUR register must be read before going into sleep or stop mode in order to clear the wake-up flag.
During read out L0 must be at high level and should stay high when entering sleep or stop.
Comments:
CS2 bit at 0 = open failure. CS2 bit at 1 = short failure.
(CS3 bit at 0 and (CS1 = 1 or CS2 =1)) = CANH failure. CS3 bit at 1 = CANL failure.
CS1 and CS0 bits: short type failure coding (GND, VDD or VBAT).
In case of multiple failures, the last failure is reported.
.
Notes
34.
CEXT Bit should be set at 0. The CAN operation in extended mode is not recommended.
FDIS
L0 Wake Input Filter (20
s Typical)
0
Enable (LO wake threshold selectable by WUR register)
1
Disable (L0 wake-up threshold is low level only, no matter D0 and D1 bits set in WUR register).
Table 17. Status Bits
CS3
CS2
CS1
CS0
Bus failure #
Description
0
no failure
0
1
CANH open wire
0
1
0
1
5
CANH short circuit to
ground
0
1
0
8, 3a
VDD
0
1
3
VBAT
1
0
1
2
CANL open wire
1
0
1
4, 7
CANL short circuit to
ground / CANH
1
0
9
VDD
1
6
VBAT
Table 18. IOR Register
IOR
D3
D2
D1
D0
$011b
W
HS1ON
GSLR1
GSLR0
R
SHIFT
HS1OT
V2LOW
VSUPLOW
Reset
0
Reset condition
POR, RESET
Table 19. Control Bits
HS1ON
HS1
0
HS1 switch turn OFF
1
HS1 switch turn ON
Table 16. CAN Transceiver Extended Modes (CAN with CEXT bit =1 is not recommended)
CEXT (34)
CCTR1
CCTR0
Mode
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