參數(shù)資料
型號: M54617P
廠商: Mitsubishi Electric Corporation
英文描述: LAN TRANSCEIVER
中文描述: 網(wǎng)絡收發(fā)器
文件頁數(shù): 2/8頁
文件大?。?/td> 116K
代理商: M54617P
LAN TRANSCEIVER
M54617P
MITSUBISHI <CONTROL / DRIVER IC>
FUNCTION
Pin function
Pin No.
Pin name
I/O
Function
T
X
Input
Data signal input pin
STB
Input
Standby signal input pin
L: standby mode, H: normal operation
Error signal output pin and error reset input pin
“L” level output when abnormal transmission route is detected
Error reset with “H” level input when in the standby mode
ERR
I/O
R
X
Output
Signal output pin from transmission route
V
SS
Input
Grounding pin
BUS(-)
I/O
Signal output pin to transmission route and signal input pin from transmission route (negative logic)
BUS(+)
I/O
Signal output pin to transmission route and signal input pin from transmission route (positive logic)
Power supply pin
V
DD
Input
1
2
3
4
5
6
7
8
ABNORMALITY DETECTION OF TRANSMISSION
ROUTE AND COMMUNICATION FUNCTION
The M54617P uses its driver overcurrent detection function and
transmission signal logic abnormality function to perform the
abnormality detection of the transmission route, and outputs error
signal (ERR(3 pin) = “L”).
In addition, switching the signal that is output to Rx pin (pin 4)
according to the abnormality occurrence status permits
communication after abnormality has occurred.
(1) Overcurrent detection
BUS(+) pin (pin 7) and BUS(-) pin (pin 6) drivers of M54617P are
equipped with an overcurrent detection circuit. When overcurrent
flows to a driver, the driver is turned OFF to output error signal
(ERR (pin 3) = “L”). Once an overcurrent is detected, the driver
maintains the OFF status until the error is reset.
In addition, each driver of BUS(+) pin (pin 7) and BUS(-) pin (pin 6)
is independent, and both may be turned OFF depending upon the
abnormality occurrence status.
A built-in filter for the prevention of malfunction due to overcurrent
when the driver is turned ON does not permit the detection of the
overcurrent status for a short time (several hundred ns). Detection
current is set to about 180mA.
(2) Logic abnormality detection
The M54617P transmission signals operate in the opposite phase
to each other, and abnormal transmission route is detected by
comparing these signals. Upon comparing respective signals after
a set time on the basis of the edge of transmission routes BUS(+)
and BUS(-), any disagreement is regarded as abnormal
transmission, and error signal (ERR (pin 3) = “L”) is output. In order
to be well timed with that edge as a new standard, abnormality is
detected when signal disagreement continues for more than a set
time. Setting time is set to about 4.2
μ
s.
Logic abnormality detection does not cope with more than one
error mode.
Detection of logic abnormality alone does not allow the driver to be
turned OFF. Abnormality detection allows the driver to be turned
OFF only when overcurrent is detected.
(3) Communication function
The M54617P ordinarily outputs the differential signals of BUS(+)
(pin 7) and BUS(-) (pin 6). When abnormality is detected, signals to
be output to Rx pin (pin 4) are switched according to the status.
When overcurrent is detected, the driver or the transmission route
in which overcurrent is detected is considered abnormal, and error
signal is output, and concurrently the signal of another
transmission route is output to Rx output (pin 4).
As described in the above section (1), both drivers are turned OFF
in some cases. In these cases, Rx output (pin 4) is fixed to “L”.
When logic abnormality is detected, error signal (ERR (pin 3) = “L”)
is output, and concurrently Rx output (pin 4) is turned to “L”. After
error signal is output, the transmission route in which the edge of
transmission signals is detected is considered normal, and such
signal is output to Rx output (pin 4).
In switching operation of error signal output and Rx output the
priority is given to overcurrent detection over logic abnormality
detection.
相關(guān)PDF資料
PDF描述
M54640P STEPPER MOTOR DRIVER
M55SP-1 Stepping Motors
M56787FP SPINDLE MOTOR DRIVER
M57716 430-450MHz 12.5V,17W,SSB MOBILE RADIO
M57716L 360-380MHz, 12.5V, 13W, DIGITAL MOBILE RADIO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M54640P 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Stepper Motor Driver
M54640P(#TC0J) 制造商:Renesas Electronics Corporation 功能描述:
M54641 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
M54641FP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
M54641L 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION