SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 284

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

Data Sheet
12.1.8
12.1.8.1 General Operation
The autobaud detection unit in the ASC provides a capability to recognize the mode and
the baudrate of an asynchronous input signal at RXD. Generally, the baudrates to be
recognized must be known by the application. With this knowledge always a set of nine
baudrates can be detected. The autobaud detection unit is not designed to calculate a
baudrate of an unknown asynchronous frame.
Figure 88 shows how the autobaud detection unit of the ASC is integrated into its
asynchronous mode configuration. The RXD data line is an input to the autobaud
detection unit. The clock f
autobaud detection unit as time base. After successful recognition of baudrate and
asynchronous operating mode of the RXD data input signal, bits in the S0CON register
and the value of the S0BG register in the baudrate timer are set to the appropriate
values, and the ASC can start immediately with the reception of serial input data.
Figure 88
The following sequence must be generally executed to start the autobaud detection unit
for operation :
Definition of the baudrates to be detected : standard or non-standard baudrates
Programming of the Prescaler/Fractional Divider to select a specific value of f
Starting the Prescaler/Fractional Divider (setting CON_R)
Preparing the interrupt system of the CPU
RXD
f
MOD
Autobaud Detection
Decoding
ASC Asynchronous Mode Block Diagram
IrDA
Prescaler /
Fractional
Autobaud
Detection
Divider
DIV
Mux
f
which is generated by the fractional divider is used by the
DIV
Receive / Transmit
Shift Registers
Serial Port
Buffers and
Baudrate
Control
Timer
284
Asynchronous/Synchr. Serial Interface
Coding
IrDA
Asynchronous
Mode
Mux
2001-04-19
DIV
C161U
TXD