SDA9251-2X Datasheet, PDF (15/23 Pages) Siemens Semiconductor Group – 868352-Bit Dynamic Sequential Access Memory for Television Applications (TV-SAM)

SDA 9251-2X
Operation Truth Table
SCAD
RE Cycle N
SAR
SAC
RA0…RA7 CA0…CA5
Mode
M0 M1
L
L
RA0…RA7 CA0…CA5 H
L
RA0…RA7 CA0…CA5 L
H
X
X
HH
X
X
X
XX
RE Cycle N + n, n = 1, 2, 3 …
OEA OEB SCA SCB RA RB WT Operation
X
X
X
X
X
X Read transfer from
memory to shifter A
X
X
X
X
X
X Read transfer from
memory to shifter B
X
X
X
X
X
X
Write transfer from
shifter C to memory
X
X
X
X
X
X
X Refresh with
internal row address
L
X
X
X
X
X Serial read port A
X
X
X
X
X
X
L
X
X
X
X Serial read port B
X
X
X
X
X
X
X
X
X
X
X Serial read port C
Note: X = Dont’t care
V(TF) = V_IL (TF) or not connected
Row address, column address and mode bits have to be
defined in RE cycle N in order to become effective in RE
cycle N + 1
Semiconductor Group
173