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AN2784 Arkusz danych(PDF) 22 Page - STMicroelectronics

Numer części AN2784
Szczegółowy opis  Using the high-density STM32F10xxx FSMC peripheral to drive external memories
PDF  31 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2784 Arkusz danych(HTML) 22 Page - STMicroelectronics

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Interfacing with an 8-bit NAND Flash memory
AN2784
22/31
Doc ID 14779 Rev 4
Figure 10.
NAND memory access timing
4.1.1
Typical use of the FSMC to interface with a NAND memory
The STM32F10xxx FSMC NAND Flash controller can configure Bank2 or Bank3 to support
NAND Flash memories.
The banks are selected using the Chip Select signals, as each bank is associated with a
specific Chip Select.
To enable communication with the NAND Flash devices, the FSMC NAND Flash controller
has to be initialized to meet the characteristics of the NAND Flash devices: features, timings,
data width, etc.
In this application note, the Numonyx NAND512W3A is used as the reference. This memory
has the same access protocol as many other NAND Flash memories on today’s market.
NAND512W3A characteristics:
●
NAND interface: x8 bus width, multiplexed address/ data
●
Page size: x8 device: (512 + 16 spare) bytes
●
Page Read/Program timings:
–
Random access: 12 µs (3 V)/15 µs (1.8 V) (max)
–
Sequential access: 30 ns (3 V)/50 ns (1.8 V) (min)
–
Page Program time: 200 µs (typ)
NCE
NOE
NWE
Write
Data
Read
Data
SET + 1
WAIT + 1
HOLD + 1
HCLK
A[25:0]
HiZ + 1
ai15183



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