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STR720 Datasheet(PDF) 123 Page - STMicroelectronics

Part # STR720
Description  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 123 Page - STMicroelectronics

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STR720 - EXTERNAL MEMORY INTERFACE (EMI)
123/401
Bit 4:2
C_LENGTH[2:0]: Cycle Length.
The C_LENGTH field selects the number of wait states that will be inserted in any
read/write cycle performed in memory Bank 1. The total CS length of any read or
write cycle will be equal to C_LENGTH+2 periods of the EMI internal clock.
= 0x0. 0 wait states.
= 0x1. 1 wait state.
= 0x2. 2 wait states.
= 0x3. 3 wait states.
....
= 0x7. 7 wait states.
Bit 1
Reserved. This bit must be always written to ‘0’.
Bit 0
Reserved. This bit must be always written to ‘1’.
Note
When asynchronous ready operation is configured (EREN = 1 and ISYN0 = 0) the
number of wait states configured in C_LENGTH field must be greater than 4.
1



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