參數(shù)資料
型號(hào): S3C8465XX-AQ
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP64
封裝: 0.750 INCH, SDIP-64
文件頁(yè)數(shù): 19/33頁(yè)
文件大小: 228K
代理商: S3C8465XX-AQ
S3C8465/C8469/P8469
ELECTRICAL DATA
19-13
Table 19-12. External Memory Timing Characteristics (8 MHz)
(TA = – 40°C to + 85°C, VDD = 2.7 V to 5.5 V)
Number
Symbol
Parameter
Normal Timing (ns)
Min
Max
1
tdA (AS)
Address valid to
AS ↑ delay
10
2
tdAS (A)
AS ↑ to address float delay
35
3
tdAS (DR)
AS ↑ to read data required valid
140
4
twAS
AS Low width
43.75 (35)
5
tdA (DS)
Address float to
DS ↓
0
6a
twDS (read)
DS (read) Low width
156.25 (125)
6b
twDS (write)
DS (write) Low width
81.25 (65)
7
tdDS (DR)
DS ↓ to read data required valid
80
8
thDS (DR)
Read data to
DS ↑ hold time
0
9
tdDS (A)
DS ↑ to address active delay
20
10
tdDS (AS)
DS ↑ to AS ↓ delay
30
11
tdDO (DS)
Write data valid to
DS (write) ↓ delay
10
12
tdRW (AS)
R/
W valid to AS ↑ delay
20
13
tdDS (DW)
DS ↑ to write data not valid delay
20
NOTES:
1.
All times are in nanoseconds (ns) and assume an 8-MHz input frequency.
2.
Wait states add 100 ns to the time of numbers 3, 6a, 6b, and 7.
3.
The values for twAS and twDS that are shown in parentheses "( )" assume a 10-MHz input clock.
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