HYB18L128160BF Datasheet, PDF (32/53 Pages) Infineon Technologies AG – DRAMs for Mobile Applications

HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional Description
Data for any WRITE burst may be concatenated with or truncated with a subsequent WRITE command. In either
case, a continuous flow of input data can be maintained. A WRITE command can be issued on any positive edge
of clock following the previous WRITE command. The first data element from the new burst is applied after either
the last element of a completed burst (Figure 27) or the last desired data element of a longer burst which is being
truncated (Figure 28). The new WRITE command should be issued x cycles after the first WRITE command,
where x equals the number of desired data elements.
CLK
Command NOP
Address
DQ
WRITE
Ba A,
Col n
DI n
NOP
DI n+1
NOP
DI n+2
NOP
DI n+3
WRITE
Ba A,
Col b
DI b
NOP
DI b+1
NOP
DI b+2
NOP
DI b+3
Ba A, Col n (b) = Bank A, Column n (b)
DI n (b) = Data In to column n (b)
Burst Length = 4 in the case shown.
3 subsequent elements of Data In are provided in the programmed order following DI n (b).
Figure 27 Consecutive WRITE Bursts
= Don't Care
CLK
Command NOP
Address
DQ
WRITE
Ba A,
Col n
DI n
WRITE
Ba A,
Col a
DI a
WRITE
Ba A,
Col x
DI x
WRITE
Ba A,
Col m
DI m
NOP
DI m+1
NOP
DI m+2
NOP
DI m+3
NOP
Ba A, Col n etc. = Bank A, Column n etc.
DI n etc. = Data In to column n etc.
Burst Length = 4 in the case shown; bursts are terminated by consecutive WRITE commands.
3 subsequent elements of Data In are provided in the programmed order following DI m .
Figure 28 Random WRITE Bursts
Non-consecutive WRITE bursts are shown in Figure 29.
= Don't Care
CLK
Command NOP
Address
DQ
WRITE
Ba A,
Col n
DI n
NOP
DI n+1
NOP
DI n+2
NOP
DI n+3
NOP
WRITE
Ba A,
Col b
DI b
NOP
DI b+1
NOP
DI b+2
Ba A, Col n (b) = Bank A, Column n (b)
DI n (b) = Data In to column n (b)
Burst Length = 4 in the case shown.
3 subsequent elements of Data In are provided in the programmed order following DI n (b).
Figure 29 Non-Consecutive WRITE Bursts
= Don't Care
Data Sheet
32
V1.4, 2004-04-30