鈥?/div>
+5 Volts
RESET
Data Input/Output
Clock
Ground
Battery (+)
No Connection
DESCRIPTION
The DS1200 Serial RAM Chip is a miniature read/write
memory which can randomly access individual 8-bit
strings (bytes) or sequentially access the entire 1024-bit
contents (burst). Interface cost to a microprocessor is
minimized by on-chip circuitry which permits data trans-
fers with only three signals: CLOCK, RST, and DATA IN-
PUT/OUTPUT.
Nonvolatility can be achieved by connecting a battery of
2 to 4 volts at the battery input V
BAT
. A load of 0.5
碌A(chǔ)
should be used to size the external battery for the re-
quired data retention time. If nonvolatility is not required
the V
BAT
pin should be grounded.
For a complete description of operating conditions,
electrical characteristics, bus timing, and signal de-
scriptions other than V
BAT
, see the DS1201 Electronic
Tag 1024-Bit data sheet.
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