DS2223 Dallas Semiconducotr, DS2223 Datasheet - Page 4

• Manufacturer Part Number: DS2223
• Description: EconoRAM
• Manufacturer: Dallas Semiconducotr

COMMAND WORD Figure 4
READ/WRITE TRANSACTION Figure 5
DS2223/DS2224
080598 4/10
MSB
W/R
TRANSACTION
DS2223
DS2224
264–BIT
W/R
LSB
ALL 1s – WRITE
ANY 0 – READ
COMMAND WORD
COMMAND WORD
W/R
INCREMENT ADDRESS POINTER
(RESET ADDRESS POINTER)
COMMAND WORD TO RESET
RECEIVE COMMAND WORD
READ/WRITE DATA BIT AND
HOLD ADDRESS POINTER
VALUE, WAIT FOR NEW
ADDRESS COUNTER
W/R
READ/WRITE FLOW
POINTER = 256?
IS ADDRESS
W/R
Y
ROM
256–BIT SRAM
224–BIT SRAM
SELECT BITS
0
N
8 BITS
0
1
LSB