SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 275

• 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

12.1.5.5 RXD/TXD Data Path Selection in Asynchronous Modes
The data paths for the serial input and output data of the ASC in asynchronous modes
are affected by several control bits in the registers CON and ABCON as shown in
Figure 83. The synchronous mode operation is not affected by these data path selection
capabilities.
The input signal from RXD passes an inverter which is controlled by bit ABCON_RXINV.
The output signal of this inverter is used for the autobaud detection and may bypass the
ASC logic in the echo mode (controlled by bit ABCON_ABEM). Further, two multiplexers
are in the RXD input signal path for providing the loopback mode capability (controlled
by bit CON_LB) and the IrDA receive pulse inversion capability (controlled by bit
CON_RXDI).
Depending on the asynchronous operating mode (controlled by bitfield CON_M), the
ASC output signal or the RXD input signal in echo mode (controlled by bit
ABCON_ABEM) is switched to the TXD output via an inverter (controlled by bit
ABCON_TXINV).
Figure 83
Note: In echo mode the transmit output signal of the ASC logic is blocked by the echo
Data Sheet
RXD
mode output multiplexer. Figure 83 also shows that it is not possible to use an
IrDA coded receiver input signal for autobaud detection.
RXD/TXD Data Path in Asynchronous Modes (ASC)
LB
RXINV
RXDI
Coding
IrDA
Asynch. Mode Logic
Autobaud
Detection
ABCON
ASC
ABEM
CON
275
Asynchronous/Synchr. Serial Interface
Decode
M
IrDA
TXINV
2001-04-19
C161U
TXD