13.2 X607 and X608: SRAM
13.2.1 Specifications
X607 : 128K bytes battery backup
X608 : 512K bytes battery backup
For
I-7188XA, I-7188XC, I-7188XB, I-7188XG, I-7188EX, I-7188EG
***
X607 and X608 are support file system.
***
Power consumption: 0.5W
Introduction:
There are two modes of power supplies to SRAM, I-7188(VCC) mode
and battery mode. The voltage of the battery is 3 V, the voltage of I- I-
7188 mode is 5 V. I-7188 (VCC) is the primary power supply when it is
powered on. SRAM will consume the battery power if I-7188 power off.
SRAM requires a minimum of 2.0 V at battery mode. Data loss
happens when power voltage is less than 2.0 V. An automatic
backup will take place when I-7188 is power off. The battery is
replaceable. However, there is a risk to loose data during the process
of changing batteries.
Specifications:
1. The minimum data retention supply voltage is 2.0V
2. The X607 can provide 9 years backup time
( Shutdown 24 hours everyday).
3. The X608 can provide 2 years backup time.
( Shutdown 24 hours everyday).
4. Operating temperature: +0°C to +70°C
13.2.2 Programming
:
For Software Installation & Demo Program, Refer to Section 2.2.2
I/O Expansion Bus for 7188X/7188E User’s Manual, Jan/2005 v1.5, 7PH-000-15---114