Semiconductor Group 64
HYB 3164(5)400J/T-50/-60
16M x 4-DRAM
TRUTH TABLE
FUNCTION RAS CAS WRITE OE ROW
ADDR
COL
ADDR
I/O1-
I/O4
Standby H H - X X X X X High Impedance
Read L L H L ROW COL Data Out
Early-Write L L L X ROW COL Data In
Delayed-Write L L H - L H ROW COL Data In
Read-Modify-Write L L H - L L - H ROW COL Data Out, Data In
Fast Page Mode Read 1st Cycle L H - L H L ROW COL Data Out
2nd Cycle L H - L H L n/a COL Data Out
Fast Page Mode Early
Write
1st Cycle L H - L L X ROW COL Data In
2nd Cycle L H - L L X n/a COL Data In
Fast Page Mode RMW 1st Cycle L H - L H - L L - H ROW COL Data Out, Data In
2st Cycle L H - L H - L L - H n/a COL Data Out, Data In
RAS only refresh L H X X ROW n/a High Impedance
CAS-before-RAS refresh H - L L H X X n/a High Impedance
Test Mode Entry H - L L L X X n/a High Impedance
Hidden Refresh READ L-H-L L H L ROW COL Data Out
WRITE L-H-L L L X ROW COL Data In
