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Hardware Submodules
3.12
I 2 C
MCF5253 has two I 2 C modules (I 2 C0 and I 2 C1) and is fully compatible with the I 2 C-bus standard. On the
M5253 demo board, the I 2 C0 is connected to the EEPROM, the audio codec, and the power manager.
The I 2 C1 is reserved for customer usage.
Here is a list of the I 2 C device default addresses on the I 2 C0.
Table 3. I 2 C Device Addresses
I 2 C Device
EEPROM
WM8731
MC34702
I 2 C address
0b1010000x
0b0011010x
0b1110111x
3.13
QSPI
The MCF5253’s QSPI module has up to seven signals: QSPI_Dout, QSPI_Din, QSPI_CLK, and
QSPI_CS[3:0]. On the M5253 demo board, the QSPI module is not connected to any QSPI device, but is
just routed out at the serial connector.
3.14
RS232
The MCF5253 includes three UART modules. To reduce the board’s dimensions and cost down, we
consider that the three UART’s should share the transceiver and the DB9 connector with the jumpers J12,
J13, J20, and J24.
3.15
SD Card Interface
The MCF5253 has a flash media interface which can interface with the Sony Memory Stick and
Multi-Media Card (MMC)/Secure Digital (SD) flash cards. The M5253 demo board installs an MMC/SD
socket for evaluation and verification.
3.16
Audio Interface
The MCF5253 contains an audio interface module (AIM) which is equipped with three serial-audio
interfaces compliant with the Phillips I2S and Sony EIAJ formats. The M5253 demo reserves an audio
AD/DA IC WM8731 for the audio application development. It is connected to I2S1 by default. The MCLK
signal has a frequency of 11.1896 MHz and comes from the MCF5253. The WM8731 is Wolfson’s
low-power stereo codec with an integrated headphone driver. It implements stereo 24-bit multi-bit
sigma-delta ADCs and DACs with oversampling, digital interpolation, and decimation filters.
3.17
AD Module
The MCF5253 has a 12-bit 6-channel analog-to-digital module. The M5253 demo board provides a 3-axis
accelerator and two potentiometers connected to the ADIN0~4 for demonstration. The analog channels are
M5253 Demo Board User Manual, Rev. 0
8
Freescale Semiconductor
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