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參數(shù)資料
| 型號(hào)： | M59330P |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | LAN Transceiver |
| 中文描述： | 網(wǎng)絡(luò)收發(fā)器 |
| 文件頁(yè)數(shù)： | 4/11頁(yè) |
| 文件大?。?/td> | 219K |
| 代理商： | M59330P |
M59330P
Rev.1.0, Sep.16.2003, page 4 of 10
(3) Communication functions
The M59330P normally outputs differential signals on BUS (+) (pin 7) and BUS (-) (pin 6), but when an anomaly is
detected, switches signal output to the R
X
pin (pin 4) according to the anomaly state.
When overcurrent is detected, an anomaly with the driver or transmission channel for which the overcurrent was
detected is assumed, and an error signal is output; at the same time, the signal for the other transmission channel is
output to the R
X
output (pin 4). As explained in (1) above, in some cases both drivers may be turned off; in such cases,
the R
X
output (pin 4) is fixed at "L".
When a logical anomaly is detected, an error signal (
ERR
(pin 3) = "L") is output, and at the same time the R
X
output
(pin 4) is driven to "L". After error signal output, a transmission channel for which a transmission signal edge is
detected is regarded as normal, and the signal for the channel is output to the R
X
output (pin 4).
Overcurrent detection takes precedence over logical anomaly detection in operations to switch the error signal output
and R
X
output.
Table 1. Anomaly modes and anomaly detection functions
Anomaly mode
Error output
Communication after
anomaly detection
Y
Y
Y
Y
Method of anomaly detection
1
2
3
4
GND short
VDD short
Open
GND short
Y
Y
Y
Y
(2)
(1), (2)
(2)
(1), (2)
Bus(+)
5
6
6
VDD short
Open
Y
Y
Y
Y
Y
N
(2)
(2)
(1)
Bus(–)
BUS(+), BUS(–) short
Error Reset
After standby mode is entered (the
STB
pin (pin 2) ="L"), the M59330P error output is reset by inputting level "H" to
the
ERR
pin (pin 3). In this case, all operations relating to anomaly detection, such as overcurrent detection and R
X
output switching, are canceled.
Standby Mode
By driving the
STB
pin (pin 2) to "L" level, the M59330P can be put into a low consumption current mode.
In standby mode, the driver and overcurrent detection functions do not operate, but the logical anomaly detection
function continues to operate, and except for overcurrent detection, detection of anomalies is possible. However, there
is only error signal output, and R
X
output signal switching is not performed.
In standby mode, the R
X
output is the logical sum of the BUS(+) signal and the
BUS(-)
signal.
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