Operation of Board Components
44
IGLOO PLUS Starter Kit User’s Guide
SPI Flash
One 2 Mbyte SPI flash is available on the board and can be used by CoreABC-type applications for access of additional
memory. The flash interface, serial peripheral interface bus (SPI), is a synchronous serial data link standard that is used
to access the flash memory. Some advantages of the SPI interface are full duplex communication and higher throughput
than I2C. In the schematics shown in
Figure 4-22
, either the Winbond or Atmel 2 Mbyte SPI flash will be populated
on-board.
Winbond and Atmel SPI flash datasheets are available at the IGLOO PLUS Starter Kit website page:
http://www.actel.com/products/hardware/devkits_boards/iglooplus_starter.aspx
.
Figure 4-22 · SPI Flash Schematics
Note:
Either the Winbond or Atmel SPI flash will be populated on the board.
V3P3
V3P3
SPI_DIO
[4]
SPI_DO
[4]
SPI_CLK
[4]
SPI_CS_N
[4]
SPI_WP_N
[4]
SPI_HOLD_N
[4]
SPI_DIO
[4]
SPI_DO
[4]
SPI_CLK
[4]
SPI_CS_N
[4]
SPI_WP_N
[4]
SPI_HOLD_N
[4]
2 MByte
Mfr P/N : W25X16-VSSIG
Mfr: Winbond
C67
0.1uF 10V
C67
0.1uF 10V
HOLD
7
Vcc
8
CS
1
DIO
5
WP
3
GND
4
DO
2
CLK
6
SPI FLASH
16M bit
U11
W25X16
SPI FLASH
U11
W25X16
SI
1
SO
8
SCK
2
CS
4
WP
5
RESET
3
VCC
6
GND
7
SPI FLASH
16M BIT
U23
AT45DB161D-SU
Manufacturer = Atmel
MANUFACTURER P/N = AT45BD161D-SU
SPI FLASH
16M BIT
U23
AT45DB161D-SU
Manufacturer = Atmel
MANUFACTURER P/N = AT45BD161D-SU
R47
4.87K
R47
4.87K
C50
0.1uF 10V
C50
0.1uF 10V
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