參數(shù)資料
型號: X930A
廠商: Intel Corp.
英文描述: UNIVERSAL SERIAL BUS MICROCONTROLLER
中文描述: 通用串行總線的微控制器
文件頁數(shù): 26/38頁
文件大?。?/td> 283K
代理商: X930A
22
ADVANCE INFORMATION
8x930Ax UNIVERSAL SERIAL BUS (USB) MICROCONTROLLER
5.4.4
DEFINITION OF REAL-TIME WAIT SYMBOLS
5.4.5
REAL-TIME WAIT FUNCTION AC CHARACTERISTICS
Table 12. Real-time Wait Timing Symbol Definitions
Signals
Conditions
A
Address
L
Low
D
Data
X
Hold
C
WCLK
V
Setup
Y
WAIT#
W
WR#
R
RD#/PSEN#
Table 13. Real-time Wait AC Timing Specifications
Symbol
Parameter
F
CLK
Variable
(1) (2)
Typ
Units
Min
Max
T
CLYV
T
CLYX
T
RLYV
T
RLYX
T
WLYV
T
WLYX
NOTES:
1.
2.
Wait Clock Low to Wait Setup
0
0.5 T
CLK
– 13
(0.5+W)T
CLK
– 13
0.5 T
CLK
– 13
(0.5+W)T
CLK
– 13
0.5 T
CLK
– 13
(0.5+W)T
CLK
– 13
ns
Wait Hold after Wait Clock Low
(W)T
CLK
+ 5
0
ns
PSEN# or RD# Low to Wait Setup
ns
Wait Hold after PSEN# or RD# Low
(W)T
CLK
+ 5
0
ns
WR# Low to Wait Setup
ns
Wait Hold after WR# Low
(W)T
CLK
+ 5
ns
W = 0, 1, 2, ... is the number of real-time wait states.
Real-time Wait function has a critical timing for instruction read. It is not advisable to use this feature
for instruction read during page mode.
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