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5.3 Specifications
General environment
Operating temperature: -25°C to +75°C
Storage temperature: -40°C to +85°C
Humidity: 0 to 90 %
Built-in Watch Dog Timer (1.6 seconds)
Built-in power protection & network protection circuit
Program download from PC
Built-in I/O expansion bus interface for 7188EX(D) & 7188EX-256(D)
5.3.1 Specifications for 7188EX(D), 7188EX-256(D) &
7188EA(D)
System
Module name: Embedded controller
CPU: Am188™ES, 40M Hz, or compatible
SRAM: 512K bytes for 7188EX(D) & 7188EX(D)-256 & 7188EA(D)
FLASH ROM:
512K bytes for 7188EX(D) & 7188EA(D)
256K bytes for 7188EX-256(D)
COM port: COM1=RS-232, COM2=RS-485
Built-in RTC, NVRAM & EEPROM
Program download from COM1
Built-in 64-bits hardware unique serial number
Real Time Clock
Year-2000 compliance
Gives seconds, minutes, hours, date of the month
Gives month and year,
from 1980 to 2079
NVSRAM: 31 bytes, battery backup, data valid up to 10 years
EEPROM
2048 bytes (8 blocks, each block has 256 bytes)
Data retention > 100 years
1,000,000 erase/write cycles
7188E Series Hardware User’s Manual, 2004, v2.2, 7MH-016-22 ----- 73