參數(shù)資料
型號: HY5R256HC
英文描述: -|2.5V|8K|40|Direct RDRAM - 256M
中文描述: - |為2.5V | 8K的| 40 |直接RDRAM的- 256M
文件頁數(shù): 35/64頁
文件大小: 4542K
代理商: HY5R256HC
Rev.0.9 / Dec.2000
35
Direct RDRAM
256/288-Mbit (512Kx16/18x32s) Preliminary
.
Figure 36: NAPX Register
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Control Register: NAPX
Address: 045
16
Read/write register.
Reset value is undefined
Note : t
SCYCLE
is t
CYCLE1
(SCK cycle time)
NAPXA4..0 - Nap Exit Phase A. This field specifies
the number of SCK cycles during the first phase for
exiting NAP mode. It must satisfy:
NAPXAt
SCYCLE
> t
NAPXA,MAX
Do not set this field to zero.
0
0
0
0
0
DQS
NAPXA4..0
NAPX4..0
NAPX4..0 - Nap Exit Phase A plus B. This field specifies the number of SCK
cycles during the first plus second phases for exiting NAP mode. It must satisfy:
NAPXt
SCYCLE
> t
NAPXA,MAX
+t
NAPXB,MAX
Do not set this field to zero.
DQS - DQ Select. This field specifies the number of SCK cycles (0 => 0.5
cycles, 1 => 1.5 cycles) between the CMD pin framing sequence and the device
selection on DQ5..0.
Figure 37: PDNXA Register
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Read/write register.
Reset value is undefined
PDNXA4..0 - PDN Exit Phase A. This field specifies
the number of (64SCK cycle) units during the first
phase for exiting PDN mode. It must satisfy:
PDNXA64t
SCYCLE
> t
PDNXA,MAX
Do not set this field to zero.
Note - only PDNXA5..0 are implemented.
Control Register: PDNXA
Address: 046
16
0
0
0
PDNXA12..0
Figure 38: PDNX Register
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Read/write register.
Reset value is undefined
PDNX4..0 - PDN Exit Phase A plus B. This field spec-
ifies the number of (256SCK cycle) units during the
first plus second phases for exiting PDN mode. It must
satisfy:
PDNX256t
SCYCLE
> PDNXA64t
SCYCLE
+
t
PDNXB,MAX
If this cannot be satisfied, then the maximum PDNX
value should be written, and the t
S4
/t
H4
timing window
will be modified (see Figure 49:).
Do not set this field to zero.
Note - only PDNX2..0 are implemented.
Control Register: PDNX
Address: 047
16
0
0
0
PDNX12..0
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