View tc524256bj-10-el datasheet:

TC524256BJ-10-EL IL08 C-MOS 1M (262,144 WORD x 4)-BIT MULTIPORT DRAM —TOP VIEW— INPUT A0 - A8 : ADDRESS SC IN 1 GND 28 : COLUMN ADDRESS STROBE CAS / : DATA TRANSFER/OUTPUT ENABLE DTOE SIO1 I/O 2 27 SIO4 I/O : ROW ADDRESS STROBE RAS SC : SERIAL CLOCK SIO2 I/O 3 26 SIO3 I/O : SERIAL ENABLE SE / : WRITE PER BIT/WRITE ENABLE WBWE / IN 4 25 IN DTOE SE INPUT/OUTPUT W1/IO1 I/O 5 24 W4/IO4 I/O SIO1 - SIO4 : SERIAL DATA W1/IO1 - W4/IO4 : WRITE MASK/DATA W2/IO2 I/O 6 23 W3/IO3 I/O / IN 7 NC 22 WBWE 8 NC 21 IN CAS IN 9 NC 20 RAS A8 IN 10 19 A0 IN A6 IN 11 18 A1 IN A5 IN 12 17 A2 IN A4 IN 13 16 A3 IN 14 VCC 15 A7 IN