參數(shù)資料
型號(hào): P87C592EFA
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 微控制器/微處理器
英文描述: 8-bit microcontroller with on-chip CAN
中文描述: 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQCC68
文件頁(yè)數(shù): 97/108頁(yè)
文件大?。?/td> 650K
代理商: P87C592EFA
1996 Jun 27
97
Philips Semiconductors
Product specification
8-bit microcontroller with on-chip CAN
P8xC592
22.2.4
C
ONNECTION TO AN
O
PTICAL
B
US
L
INE
Using an optical medium provides the following
advantages:
Bus nodes are galvanically decoupled.
Optical cable features very high noise immunity.
No noise emission by the bus cable.
An example for an interface to an optical connector is
given in Fig.40. In most cases a transistor is required to
amplify the TX-output current.
Thus more optical power is provided to compensate for
losses in the optical connectors and the optical star. The
P8xC592 features an on-chip
1
2
AV
DD
reference voltage
output so only a capacitor is required for the receiver part.
Two optical fibres are used to connect the bus nodes. The
TX-fibre transfers the output signal of the CAN-controller
to the optical star. The optical star transfers the TX-fibre
input signal over to all the RX-fibres. The RX-fibres
transfer the resulting optical signal over to the receivers of
all the bus nodes.
handbook, full pagewidth
MGA189
R1
56
R2
3.9 k
T1
BS170
C2
100 nF
OPTICAL
CONNECTOR
HBFR - 0501
SERIES
5 V
5 V
optical
cable
PASSIVE OPTICAL STAR
P8xC592
CTX0
CTX1
CRX0
CRX1
OUTPUT CONTROL REGISTER
00011110B (1EH)
or 00010110B (16H)
REFOUT
C1
10 nF
Fig.40 Optical Transceiver.
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