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STR71XF 数据表(PDF) 38 Page - STMicroelectronics

部件名 STR71XF
功能描述  ARM7TDMI 16/32-BIT MCU WITH FLASH, USB, CAN 5 TIMERS, ADC, 10 COMMUNICATIONS INTERFACES
PDF  49 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STR71XF 数据表(HTML) 38 Page - STMicroelectronics

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STR71xF - ELECTRICAL CHARACTERISTICS
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2.10 External Memory Bus Timing
V33 = 3.3 ± 10%, TA = -40 / 85 °C unless otherwise specified.
The tables below use a variable which is derived from the EMI_BCONn registers (described in
the STR71x Reference Manual) and represents the special characteristics of the programmed
memory cycle.
Table 21. EMI Read Operation
See Figure 10, Figure 11, Figure 12and Figure 13 for related timing diagrams.
Table 22. EMI Write Operation
See Figure 14, Figure 15, Figure 16 and Figure 17 for related timing diagrams.
Symbol
Parameter
Value
tMCLK
CPU clock period
1 / fMCLK
tC
Memory cycle time wait states
tMCLK x (1 + [C_LENGTH])
Symbol
Parameter
Test Conditions
Value
Unit
Min
Typ
Max
tRCR
Read to CSn Removal Time
tMCLK
ns
tRP
Read Pulse Time
tC
ns
tRDS
Read Data Setup Time
3
ns
tRDH
Read Data Hold Time
3
ns
tRAS
Read Address Setup Time
1.3*tMCLK
ns
tRAH
Read Address Hold Time
3
ns
tRAT
Read Address Turnaround Time
3
ns
tRRT
RDn Turnaround Time
tMCLK
ns
Symbol
Parameter
Test Conditions
Value
Unit
Min
Typ
Max
tWCR
WEn to CSn Removal Time
tMCLK
ns
tWP
Write Pulse Time
tC
ns
tWDS
Write Data Setup Time
3
ns
tWDH
Write Data Hold Time
3
ns
tWAS
Write Address Setup Time
1.3*tMCLK
ns
tWAH
Write Address Hold Time
3
ns
tWAT
Write Address Turnaround Time
3
ns
tWWT
WEn Turnaround Time
tMCLK
ns



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