K60P100M100SF2RM Datasheet, PDF (1478/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

UART signal descriptions
The C1[UARTSWAI] bit does not initiate any power down or power up procedures for
the smartcard (ISO-7816) interface.
Setting C1[UARTSWAI] does not affect the state of the C2[RE], or C2[TE].
If C1[UARTSWAI] is set, any transmission or reception in progress stops at Wait mode
entry. The transmission or reception resumes when either an internal or external interrupt
brings the CPU out of Wait mode. Exiting Wait mode by reset aborts any transmission or
reception in progress and resets the UART.
51.1.2.3 Stop mode
The UART is inactive during stop mode for reduced power consumption. The STOP
instruction does not affect the UART register states, but the UART module clock will be
disabled. The UART operation resumes from where it left off after an external interrupt
brings the CPU out of stop mode. Exiting stop mode by reset aborts any transmission or
reception in progress and resets the UART. Entering or leaving stop mode does not
initiate any power down or power up procedures for the smartcard (ISO-7816) interface.
51.2 UART signal descriptions
The UART signals are shown in the following table.
Table 51-1. UART signal descriptions
Signal
Description
I/O
CTS
Clear to send
I
RTS
Request to send
O
RXD
Receive data
I
TXD
Transmit data
O
51.2.1 Detailed signal descriptions
The UART detailed signal descriptions are shown in the following table.
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.