Signal Descriptions
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
2-12
Freescale Semiconductor
2.10
UART Module Signals
describes the UART module signals.
2.11 DMA Timer Signals
describes the signals of the four DMA timer modules.
2.12 ADC Signals
describes the signals of the analog-to-digital converter.
Table 2-9. UART Module Signals
Signal Name
Abbreviation
Function
I/O
Transmit Serial Data Output
UTXDn
Transmitter 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
URXDn
Receiver 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
UCTSn
Indicate to the UART modules that they can begin data transmission.
I
Request-to-Send
URTSn
Automatic 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
DTINn
Event input to the DMA timer modules.
I
DMA Timer Output
DTOUTn
Programmable output from the DMA timer modules.
O
Table 2-11. ADC Signals
Signal Name
Abbreviation
Function
I/O
Analog Inputs
AN[7:0]
Inputs to the A-to-D converter.
I
Analog Reference
V
RH
Reference voltage high and low inputs.
I
V
RL
I
Analog Supply
V
DDA
Isolate the ADC circuitry from power supply noise
—
V
SSA
—
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
