參數(shù)資料
型號: AT91M40807-33AI
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Microcontroller
中文描述: 32-BIT, MROM, 33 MHz, RISC MICROCONTROLLER, PQFP100
封裝: 1.40 MM HEIGHT, TQFP-100
文件頁數(shù): 31/153頁
文件大?。?/td> 1837K
代理商: AT91M40807-33AI
31
AT91X40 Series
1354D
ATARM
05/02
Figure 19.
Data Float Output Time
Notes:
1. Early Read Protocol
2. Standard Read Protocol
External Wait
The NWAIT input can be used to add wait states at any time. NWAIT is active low and is
detected on the rising edge of the clock.
If NWAIT is low at the rising edge of the clock, the EBI adds a wait state and changes
neither the output signals nor its internal counters and state. When NWAIT is de-
asserted, the EBI finishes the access sequence.
The NWAIT signal must meet setup and hold requirements on the rising edge of the
clock.
Figure 20.
External Wait
Notes:
1. Early Read Protocol
2. Standard Read Protocol
ADDR
NRD
D0 - D15
MCK
t
DF
(1)
(2)
NCS
ADDR
NCS
NWE
MCK
NRD
(1)
(2)
NWAIT
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