參數(shù)資料
型號(hào)： MCZ33989EG
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
元件分類： CAN
英文描述： System Basis Chip with High-Speed CAN Transceiver
中文描述： 系統(tǒng)基礎(chǔ)芯片高高速CAN收發(fā)器
文件頁(yè)數(shù)： 15/66頁(yè)
文件大?。?/td> 1181K
代理商： MCZ33989EG
Analog Integrated Circuit Device Data
Freescale Semiconductor
15
33989
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Figure 4. Wake-Up Block Diagram
The block diagram in
Figure 4
illustrates how the wake-up
signal is generated. First the CAN signal is detected by a low
consumption receiver (WU receiver). Then the signal passes
through a pulse width filter which discards the undesired
pulses. The pulse must have a width bigger than 0.5 μs and
smaller than 500 μs to be accepted. When a pulse is
discarded the pulse counter is reset and no wake signal is
generated, otherwise when a pulse is accepted the pulse
counter is incremental and after three pulses the wake signal
is asserted.
Figure 5. Transient Test Pulse for L0:L3 Inputs
Each one of the pulses must be spaced by no more than
500 μs. In that case the pulse counter is reset and no wake
signal is generated. This is accomplished by the wake
timeout generator. The wake-up cycle is completed (and the
wake flag reset) when the CAN interface is brought to
CAN
Normal
mode.
The wake-up capability of the CAN can be disabled, refer
to SPI interface and register section, CAN register.
Figure 6. Transient Test Pulses for CANH/CANL
Non Differential Slew Rate (CANL or CANH)
Slew Rate 3
Slew Rate 2
Slew Rate 1
Slew Rate 0
t
SL3
t
SL2
t
SL1
t
SL0
4.0
3.0
2.0
1.0
19
13.5
8.0
5.0
40
20
15
10
V/μs
Table 4. Dynamic Electrical Characteristics
(continued)
Characteristics noted under conditions 7.0 V
≤
V
SUP
≤
18 V, - 40
°
C
≤
T
A
≤
125
°
C, GND = 0 V unless otherwise noted. Typical
values noted reflect the approximate parameter means at T
A
= 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
+
WU
OUT
Latch
RST
Timeout
RST
Counter
Pulse OK
Narrow
Pulse
Pulse Width
Filter
Timeout
Generator
Standby
WU Receiver
CANH
CANL
LX
Transient Pulse
Generator
(Note)
GND
GND
1nF
10 k
Note: Waveform in accordance to
ISO 7637 part1, test pulses 1, 2, 3a and 3b.
CANH
CANL
Transient Pulse
Generator
(Note)
GND
GND
1nF
1nF
Note: Waveform in accordance to
ISO 7637 part1, test pulses 1, 2, 3a and 3b.
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參數(shù)描述
MCZ33989EG 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER
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