PowerQUICC™ MPC8313E Reference Design Board (RDB), Rev. 4
Freescale Semiconductor
15
Board-Level Functions
the reset configuration word value in I
2
C EEPROM and the boot sequencer mode, refer to the MPC8313E
reference manual.
Figure 11. I
2
C Connection
2.7
SD Memory Card Interface
An SD memory card interface connects directly to the SPI bus of the MPC8313E. SD data mode and SDIO
mode are not supported. The SPI mode is the only SD operating mode supported by this connection. Hot
insertion and removal is not supported. See
Figure 12
for the hardware connection.
For REVB boards, the SD card chip select signal is changed from GPIO31(SPISEL) to GPIO13(LA8)
because when using SPI as master mode, SPISEL cannot be set as GPIO (which is supposed to be used for
device select signal). In this case, another GPIO pin should be used. GPIO13 is implemented on this board
as an example.
I2C1-SCL
I
2
C EEROM
M24256
MPC8313E
SCL
SDA
I2C1-SDA
I
2
C Address = 0x50
I
2
C RTC
DS1339U
SCL
SDA
I
2
C Address = 0x68
I
2
C Sensor
LM75
SCL
SDA
I
2
C Address = 0x48
3.3 V
I
2
C DAC (Optional)
AD5301
SCL
SDA
I
2
C Address = 0x0C
