Datasheet

Chapter 14. UART Modules 14-23
Operation
Figure 14-25. UART/RS-232 Interface
Figure 14-26 shows a signal configuration for a UART1/CODEC interface.
Figure 14-26. UART1/CODEC Interface
Figure 14-27 shows a signal configuration for a UART1/CODEC interface. An MCF5407
general-purpose I/O (GPIO) is used as a reset to the AC ‘97 device.
Figure 14-27. UART1/AC ’97 Interface
14.5 Operation
This section describes operation of the clock source generator, transmitter, and receiver.
14.5.1 Transmitter/Receiver Clock Source
CLKIN serves as the basic timing reference for the clock source generator logic, which
consists of a clock generator and a programmable 16-bit divider dedicated to the UART.
The clock generator cannot produce standard baud rates if CLKIN is used, so the 16-bit
divider should be used.
RTS
DO2
DI1
CTS
TxD
RxD
DI2
DO1
RS-232 TransceiverUART
TIN1
SCLK0
SRx0
CTS
TxD
RxD
SSYNC0
STx0
MC143416 CODECUART1
RTS
CTS
TxD
RxD
UART1
GPIO RESET
BIT_CLK
SDATA_OUT
FRAME SYNC
SDATA_IN
AC ’97