Freescale Semiconductor 56852, Руководство пользователя

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SPI Serial EEPROM/Data FLASH Memory
Technical Summary, Rev. 3
Freescale Semiconductor 2-5
2.3 SPI Serial EEPROM/Data FLASH Memory
A 1M-bit +3.3V SPI serial EEPROM/Data FLASH Memory, Atmel AT45DB011B-SC, is
provided on the 56852EVM, reference
Figure 2-3
. This memory connects directly to the SPI
Port through a header on the 56852. It can be used to load program code and data into the 56852’s
internal or external memory spaces. Jumper block JG6 is provided to allow the user to disconnect
the on-board SPI EEPROM/Data FLASH from the SPI port and allow him to connect his own
SPI port peripheral. Since the SPI port and ISSI port are multiplexed on the 56852, the SPI port
jumpers need to be removed to use the ISSI port. The header details are shown in
Table 2-1
.
56852
MOSI/SRFS
MISO/SRCK
SCLK/STCK
SS/STFS/PC3
Serial EEPROM /
Data FLASH
SDI
SDO
SCK
CS
Data FLASH Enable
(SPI Port Connector)
Figure 2-3. SPI EEPROM Memory Block Diagram
Table 2-1. SPI Port Connector Description
JG6
Pin # Signal Pin # Signal
1 SS/STFS/PC3 2 CS
3 MISO/SRCK 4 SDO
5 MOSI/SRFS 6 SDI
7 SCLK/STCK 8 SCK
.