參數(shù)資料
型號(hào): S3C8444XX-TW
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PQFP80
封裝: 12 X 12 MM, TQFP-80
文件頁數(shù): 18/44頁
文件大?。?/td> 301K
代理商: S3C8444XX-TW
S3C8444
ELECTRICAL DATA
16–9
Table 16–8. External Memory Timing Characteristics (10 MHz)
(TA = – 20°C to + 85°C, VDD = 4.5 V to 6.0 V)
Number
Symbol
Parameter
Normal Timing
Extended Timing
Min
Max
Min
Max
1
tdA (AS)
Address valid to
AS ↑ delay
10
50
2
tdAS (A)
AS ↑ to address float delay
35
85
3
tdAS (DR)
AS ↑ to read data required valid
140
335
4
twAS
AS low width
35
85
5
tdA (DS)
Address float to
DS ↓
0
0
6a
twDS (read)
DS (read) low width
125
275
6b
twDS (write)
DS (write) low width
65
165
7
tdDS (DR)
DS ↓ to read data required valid
80
255
8
thDS (DR)
Read data to
DS ↑ hold time
0
0
9
tdDS (A)
DS ↑ to address active delay
20
70
10
tdDS (AS)
DS ↑ to AS ↓ delay
30
80
11
tdDO (DS)
Write data valid to
DS (write) ↓ delay
10
50
12
tdAS (W)
AS ↑ to wait delay
90
335
13
thDS (W)
DS ↑ to wait hold time
0
0
14
tdRW (AS)
R/
W valid to AS ↑ delay
20
70
15
tdDS (DW)
DS ↑ to write data not valid delay
20
70
NOTES:
1.
All times are in ns and assume a 10 MHz input frequency.
2.
Wait states add 100 ns to the time of numbers 3, 6a, 6b, and 7.
3.
Auto-wait states add 100 ns to the time of number 12.
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