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參數(shù)資料
| 型號(hào)： | UPD485505 |
| 廠商： | NEC Corp. |
| 英文描述： | LINE BUFFER 5K-WORD BY 8-BIT |
| 中文描述： | 行緩沖區(qū)5K - Word的8位 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 174K |
| 代理商： | UPD485505 |
μ
PD485505
14
Data Sheet M10059EJ7V0DS00
4.2 n Bit Delay
It is possible to make delay read from the write data with the
μ
PD485505.
(1) Perform a reset operation in the cycle proportionate to the delay length. (
Figure 4.3
)
(2) Shift the input timing of write reset (RSTW) and read reset (RSTR) depending on the delay length. (
Figure 4.4
)
(3) Shift the address by disabling RE for the period proportionate to the delay length. (
Figure 4.5
)
n bit: Delay bits from write cycle to read cycle correspond to a same address cell.
Restrictions
Delay bits n can be set from minimum bits to maximum bits depending on the operating cycle time. Refer
to
2. Operation Mode Operation-related Restriction
.
Cycle time
MIN.
MAX.
25 ns
21 bits
5,048 bits
35 ns
15 bits
5,048 bits
Figure 4.3 n-Bit Delay Line Timing Chart (1)
t
WCK
t
RCK
Cycle 0
Cycle 1
Cycle 2
1 H
(n Cycles)
Cycle n–1
2 H
(n Cycles)
t
WCW
t
RCW
t
WCP
t
RCP
t
RS
t
RH
t
DH
t
DS
(0)
(1)
(n–2)
(n–1)
(0’)
(1’)
t
DS
t
DH
t
OH
t
AC
(0)
(1)
(2’)
(3’)
(2)
(3)
WCK/RCK
(Input)
D
IN
(Input)
D
OUT
(Output)
t
RS
t
RH
(2)
RSTW /
RSTR
(Input)
Cycle 0’
Cycle 0
Write
Read
Cycle 1’
Cycle 1
Cycle 2’
Cycle 2
Cycle 3’
Cycle 3
t
WAR
Remark
RE, WE = “L” level
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD485505G-25 | LINE BUFFER 5K-WORD BY 8-BIT |
| UPD485505G-35 | LINE BUFFER 5K-WORD BY 8-BIT |
| UPD4990A | SERIAL I/O CALENDAR & CLOCK CMOS LSI |
| UPD4990AC | SERIAL I/O CALENDAR & CLOCK CMOS LSI |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD485505-2G | 制造商:NEC Electronics Corporation 功能描述: |
| UPD485505G-25 | 制造商:NEC Electronics Corporation 功能描述: |
| uPD485505G-25-A | 制造商:Renesas Electronics 功能描述:18ns 5V Cut Tape |
| UPD485505G-35-A | 制造商:Renesas Electronics 功能描述:25ns 5V Cut Tape |
| UPD485506G5-25-7JF | 制造商:NEC Electronics Corporation 功能描述: 制造商:NEC Electronics Corporation 功能描述:FIELD/FRAME/LINE MEMORY, 44 Pin, Plastic, TSOP |
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