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1.7
Jumper Setting
The JP1 setting of the 7188XA/7188XAD are given as follows.
1
5
6
COM1 = RS-232 (default)
1.8
Reconfiguring the 7188XC(D)/7521(D)
From pin-4 to pin-8 of the 7188XC(D)/7521(D) there are three D/O & two
D/I pins. For the application of "Customized 7000 Modules", these 5 D/I/O
pins can be hardware reconfigured to other functions as follows:
Step 1: Remove the reconfiguration-resistor as follows:
l If DO3 is reconfigured, remove R19
l If DO2 is reconfigured, remove R20
l If DO1 is reconfigured, remove R21
l If DI3 is reconfigured, remove R22
l If DI2 is reconfigured, remove R23
Then, the onboard D/I/O functions can be disabled.
Step 2: Install a 5-pin male reconfiguration-jumper into the TP0 of the
7188XC(D)/7521(D)
Step 3: Design a 5-pin female reconfiguration-jumper in X??? for
connection to TP1. Then the external signals from pin-4 to pin-8
can be connected to X???. The user can refigure these 5 D/I/O pins
to their special requirements now.
Note: If the DO2 is reconfigured to D/I, its initial state must be High. If its
initial state is LOW, system clock will be reduced to 10M. So all
clock-related libraries will only be at half-speed.
7188XA/B/C & 7521/2/2A/3/4/7 Series Hardware User' s Manual, Ver. 2.0 Sep/2002, 7Mh-001-20 -----
+7(495)109-02-08 sales@bbrc.ru www.bbrc.ru
232
2
1
5
232
6
2
COM1 = RS-485
58
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