Shanghai ZLAN Information Technology Co., Ltd Tel: +86-17321037177 http://www.zlmcu.com
18
RXD2,
TXD2
IN/OUT 9, 10
Support serial port of high-speed up to 921.6Kbps, if
using high-speed serial port, CONFIG needs to pull
down, and need to connect an I2C chip (such as
AT24C02).
SCL, SDA /
71, 72
When high speed serial port is required, the SCL and
SDA of the I2C chip (such as AT24C02) are connected
with these two pins.
Input & Output
RUN_LED OUT
14
Run the indicator light, when MCU works normally, it will
output a square wave of 2s period. Can light LED via
10K resistor to indicate the chip in work.
100M
OUT
61
Can call 100M_LINK, means the network line is
connected. At 0, indicate that the RJ45 network line of
module has been connected.
LINK
OUT
53
TCP connection indicator. When 0, means module has
built TCP connection with network server or in UDP
Mode, and the cable connection normally, thus the
module can send and receive data. If cut cable, the LINK
will be 1.
ACT
OUT
54
Data activity indicator. When 0, means ZLAN1003 port
has data transceiver. But the pin will be in change
between 0 and 1 when there has data, ACT=1, cannot
be sign of non-data communication.
DEF
IN
55
Parameter RESET. When be 0 and time keep over 1s,
the module will restart with default IP in static mode,
Gateway 255.255.255.0, 192.168.1.1. This is avail for
user forgot IP, can reset it to default.
485_TEN
OUT
60
485 sending control end, normal 0, when sending data to
serial port will be 1. Can directly connect TXD_EN pin of
MAX485 chip.
IO_EX
OUT
58
For IO extension.
Other
RSET_BG IN
41
Connect AGND through 1% accuracy 12.1K resistor.
PULL_DO
WN
IN
24,27,28,30,3
1
Pull-down to GND via 10K. Special note: cannot
combine these pin together to connect resistance for
grounding, it must connect the resistance separately.
PULL_UP
IN
25,33,64
Pull-up to VCC33 via 10K