Shanghai ZLAN Information Technology Co., Ltd Tel: +86-17321037177 http://www.zlmcu.com
22
selecting the speed mode of ZLAN1003. Welding RSH1 is high speed, welding
RSL2 is low speed.
5) RUN_LED drives an LED indicating that ZLAN1003 works normally.
6) CTS and CTS2 are connected together and can be used as hardware flow
control.
7) The crystal oscillator can use SMT or the straight S49 type, the capacitance is
33p and requires cross-connecting a resistance of 1M ohms.
8) R1 is the 12.1K resistance of 1% precision.
9) The reset chip uses max811reus, where MR pins are for manually reset.
Figure 10 ZLAN1003 Schematic Diagram Ethernet interface Part (RJ45 integrated
network transformer)
The design of the Ethernet port part of ZLAN1003 is shown as in figure 10, the LINK
and ACT are connected to the lamp on RJ45, to indicate TCP connection and data
activity. There are four 49.9 resistors with a precision of %1.
C 23
0.1u
R 23
49 .9 % 1
R 24
49 .9 % 1
R 21
49 .9 % 1
R 22
49 .9 % 1
C 22
0.1u
C 21
0.1u
NET_ RX+
NET_ RX-
NET_ TX +
NET_ TX -
VCC 33
R D-
6
R _C T
5
R D+
3
TD-
2
T_ CT
4
TD+
1
NC
7
C HS _G ND
8
GRE EN+
9
GRE EN-
10
YELLOW -
11
YELLOW +
12
U21HR9 111 05A
C RU ST
R 92
1K
VCC 33
R 93
1K
VCC 33
LINK
ACT
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