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Comparison table of 7188, 7188EA, 7188EX and 7188EX-256:
7188
7188EA 7188EX 7188EX-256
CPU
clock
40M 40M 40M 40M
SRAM
256K 512K 512K 256K
Flash
ROM
256K/512K
512K 512K 512K
COM1 RS-232
or
RS-
485
RS-232 RS-232 RS-232
COM2 RS-485,
non-
isolated
RS-485, self-
tuner inside,
non-isolated
RS-485, self-
tuner inside,
non-isolated
RS-485, self-
tuner inside,
non-isolated
COM3
RS-232
No Com3
No Com3
No Com3
COM4
RS-232
No Com4
No Com4
No Com4
RTC
Yes Yes Yes Yes
EEPROM
2K bytes
2K bytes
2K bytes
2K bytes
D/I(3.5V~30V)
0 6
channels
0 0
D/O(150mA, 30V)
0
7 channels
0
0
User Defined pins
0
0
14 pins
14 pins
Hardware Serial
Number inside
No Yes Yes Yes
Operation system
MiniOS7
MiniOS7 MiniOS7 MiniOS7
Programming
language
TC, MSC, BC
TC, MSC, BC
TC, MSC, BC
TC, MSC, BC
Program
download
Yes Yes Yes Yes
I/O extension bus
No
No
Yes
Yes
Ethernet interface
No
10M,10BaseT 10M,10BaseT 10M,10BaseT
7188E Series Hardware User’s Manual, 2004, v2.2, 7MH-016-22 ----- 77