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參數(shù)資料
| 型號： | CXD4000R |
| 英文描述： | Fingerprint Verification System LSI |
| 中文描述： | 指紋識別系統(tǒng)LSI |
| 文件頁數(shù)： | 12/14頁 |
| 文件大小： | 216K |
| 代理商： | CXD4000R |
–
12
–
CXD4000R
Write Timing
(Within the recommended operating range)
Item
Chip select pulse width
Read strobe pulse width
Address CSn
↓ →
WR
↓
WR
↑ →
address CSn
↑
Write data enable
→
WR
↑
WR
↑ →
write data disable
Symbol
t
WCS
t
WR
t
CSWR
t
WRCS
t
DWR
t
WRD
Min.
(3 + BWTn)
×
t
sys
–
20
(1 + BWTn)
×
t
sys
–
20
t
sys/2
–
20
t
sys/2
–
20
(1.5 + BWTn)
×
t
sys
–
20
10
Unit
ns
ns
ns
ns
ns
ns
Max.
(3 + BWTn)
×
t
sys + 20
(1 + BWTn)
×
t
sys + 20
t
sys/2 + 20
t
sys/2 + 20
(1.5 + BWTn)
×
t
sys + 20
t
sys/2 + 20
Fig. 8-2. External Memory Interface Timing (Write)
t1
t
DWR
t
WRD
t2
t
WR
t
WCS
t
CSWR
t3
t
WRCS
A0 to A20
CSn
WR
D0 to D15
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