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RM0319 Fiches technique(PDF) 105 Page - STMicroelectronics

No de pièce RM0319
Description  SPEAr320S architecture and functionality
PDF  368 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0319 Fiches technique(HTML) 105 Page - STMicroelectronics

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RM0319
External memory interface (EMI)
Doc ID 022640 Rev 3
105/368
Figure 24.
AHB-EMI interface
9.3.1
EMI cycles definition
The following figure shows the typical write cycle
.
Figure 25.
EMI write cycle
Note:
EMI_WAIT# can be used to increase the cycle time (slow peripherals).
The following figure shows the typical read cycle.
EMI_BYTEN (1:0)
EMI_D (15:0)
EMI
HCLK
HRESETn
HSEL
HADDR(31:0)
HTRANS(1:0)
HWRITE
HSIZE(2:0)
HBURST(2:0)
HWDATA(31:0)
HREADYIn
HRDATA(31:0)
HREADYout
HRESP(1:0)
EMI_A (23:0)
EMI_CE (3:0)
EMI_WE
EMI_OE
EMI_WAIT
PERIPHERAL BUS
WRITE DATA
BE#[3:0]
ADDR[28:0]
EMI_ADB
EMI_ADDLE
EMI_CE#
EMI_WE#
EMI_WAIT#



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