Signal Descriptions
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
2-10 Freescale Semiconductor

2.9 I2C I/O Signals

Table 2-8 describes the I2C serial interface module signals.

2.10 UART Module Signals

Table 2-9 describes the UART module signals.

2.11 DMA Timer Signals

Table 2-10 describes the signals of the four DMA timer modules.

Table 2-8. I2C I/O Signals
Signal Name Abbreviation Function I/O
Serial Clock SCLnOpen-drain clock signal for the for the I2C interface. It is driven by the
I2C module when the bus is in master mode or it becomes the clock
input when the I2C is in slave mode.
I/O
Serial Data SDAnOpen-drain signal that serves as the data input/output for the I2C
interface.
I/O
Table 2-9. UART Module Signals
Signal Name Abbreviation Function I/O
Transmit Serial Data Output UTXDnTransmitter serial data outputs for the UART modules. The output is
held high (mark condition) when the transmitter is disabled, idle, or in
the local loopback mode. Data is shifted out, LSB first, on this pin at
the falling edge of the serial clock source.
O
Receive Serial Data Input URXDnReceiver serial data inputs for the UART modules. Data is received on
this pin LSB first. When the UART clock is stopped for power-down
mode, any transition on this pin restarts it.
I
Clear-to-Send UCTSnIndicate to the UART modules that they can begin data transmission. I
Request-to-Send URTSnAutomatic request-to-send outputs from the UART modules. This
signal can also be configured to be asserted and negated as a
function of the RxFIFO level.
O
Table 2-10. DMA Timer Signals
Signal Name Abbreviation Function I/O
DMA Timer Input DTINnEvent input to the DMA timer modules. I
DMA Timer Output DTOUTnProgrammable output from the DMA timer modules. O