參數(shù)資料
型號(hào): PSD854F2V-15M
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 256K X 8 FLASH, 27 I/O, PIA-GENERAL PURPOSE, PQFP52
封裝: PLASTIC, QFP-52
文件頁(yè)數(shù): 98/109頁(yè)
文件大?。?/td> 908K
代理商: PSD854F2V-15M
Obsolete
Product(s)
- Obsolete
Product(s)
89/109
PSD813F2V, PSD854F2V
Doc ID 10552 Rev 3
Table 56. READ Timing (3V devices)
Note: 1. RD timing has the same timing as DS, LDS, UDS, and PSEN signals.
2. RD and PSEN have the same timing for 8031.
3. Any input used to select an internal PSD function.
4. In multiplexed mode latched address generated from ADIO delay to address output on any Port.
5. RD timing has the same timing as DS, LDS, and UDS signals.
Symbol
Parameter
Conditions
-12
-15
-20
Turbo
Off
Unit
Min
Max
Min
Max
Min
Max
tLVLX
ALE or AS Pulse Width
26
30
ns
tAVLX
Address Setup Time
(Note 3)
910
12
ns
tLXAX
Address Hold Time
(Note 3)
912
14
ns
tAVQV
Address Valid to Data Valid
(Note 3)
120
150
200
+ 20
ns
tSLQV
CS Valid to Data Valid
120
150
200
ns
tRLQV
RD to Data Valid 8-Bit Bus
(Note 5)
35
40
ns
RD or PSEN to Data Valid 8-Bit Bus,
8031, 80251
(Note 2)
45
50
55
ns
tRHQX
RD Data Hold Time
(Note 1)
00
0
ns
tRLRH
RD Pulse Width
38
40
45
ns
tRHQZ
RD to Data High-Z
(Note 1)
38
40
45
ns
tEHEL
E Pulse Width
40
45
52
ns
tTHEH
R/W Setup Time to Enable
15
18
20
ns
tELTL
R/W Hold Time After Enable
0
ns
tAVPV
Address Input Valid to
Address Output Delay
(Note 4)
33
35
40
ns
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