參數(shù)資料
型號(hào): K4R271669A
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 256K x 16/18 bit x 2*16 Dependent Banks Direct RDRAMTM
中文描述: 256 × 16/18位× 2 * 16屬銀行直接RDRAMTM
文件頁數(shù): 53/64頁
文件大?。?/td> 4052K
代理商: K4R271669A
Page 51
Direct RDRAM
K4R271669A/K4R441869A
Rev. 1.02 Jan. 2000
The SCK clock is also used for sampling data on RSL inputs
in one situation. Figure 48 shows the PDN and NAP exit
sequences. If the PSX field of the INIT register is one (see
Figure 27), then the PDN and NAP exit sequences are broad-
cast; i.e. all RDRAMs that are in PDN or NAP will perform
the exit sequence. If the PSX field of the INIT register is
zero, then the PDN and NAP exit sequences are directed; i.e.
only one RDRAM that is in PDN or NAP will perform the
exit sequence.
The address of that RDRAM is specified on the DQA[5:0]
bus in the set/hold window t
S3
/t
H3
around the rising edge of
SCK. This is shown in Figure 57. The SCK timing point is
measured at the 50% level, and the DQA[5:0] bus signals are
measured at the V
REF
level.
Figure 57: CMOS Timing - Device Address for NAP or PDN Exit
V
IH,CMOS
50%
V
IL,CMOS
80%
20%
SCK
V
DIH
V
REF
V
DIL
80%
20%
DQA[5:0]
t
S3
t
H3
PDEV
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