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19
SPD0
、
SPD1
IN
26,32
Chip running speed configuration. When pull-up to
VCC33 via 10K, configure to high-speed status. When
pull-down to GND via 10K, configure to low-speed
status. Current in low-speed is 140mA, high-speed is
210mA. The low-speed status support highest baud rate
57600bups, high-speed 115200bps.
NC
/
Other
No specified pin please hang in the air.
The following pins can be converted into IO input/output by the "Transcoding" configuration
file of ZLAN1043 chip, and the function used as indicator light and key input will be disabled.
The following pins can be used as input and output.
The output is to control the level of any of the pins through instruction defined by any value;
As input, can regularly query or initiate the state change of the IO port.
Table 2 Definable IO Pins
IO Table
Name
IO No
Pin No
DEF
PIN[0]
55
485_TEN
PIN[2]
60
100M
PIN[3]
61
RTS
PIN[4]
62
LINK
PIN[5]
53
ACT
PIN[6]
54
RUN_LED
PIN[7]
14
IO_EX
PIN[8]
58
Note: PIN[1] is reserved, directly go to PIN[2].
3. Hardware Design Direction
Here are two design examples to illustrate the design of the schematic diagram. The design
includes the following points:
1) RJ45 integrate the network transformer and no have network transformer: the former is
more integrated, but with higher cost. We introduce ZLSN3003S and SNMP card