SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 219

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

11.1
Asynchronous mode supports full-duplex communication in which both transmitter and
receiver use the same data frame format and the same baud rate. Data is transmitted on
pin TXD0 and received on pin RXD0. These signals are alternate port functions.
Figure 11-2 Asynchronous Mode of Serial Channel ASC0
Asynchronous Data Frames
8-bit data frames consist of either 8 data bits D7 … D0 (S0M = ‘001
… D0 plus an automatically generated parity bit (S0M = ‘011
even, depending on bit S0ODD in register S0CON. An even parity bit will be set, if the
modulo-2-sum of the 7 data bits is ‘1’. An odd parity bit will be cleared in this case. Parity
checking is enabled via bit S0PEN (always OFF in 8-bit data mode). The parity error flag
User’s Manual
RXD0
0
1
MUX
Asynchronous Operation
CPU
Clock
Samp-
ling
S0R
S0REN
S0FEN
S0PEN
S0OEN
S0LB
Receive Buffer Reg.
÷ 2
Receive Shift
S0RBUF
Register
Asynchronous/Synchronous Serial Interface
S0M
11-5
S0STP
Serial Port Control
Baud Rate Timer
Reload Register
Internal Bus
Shift Clock
Clock
S0FE
S0PE
Transmit Buffer Reg.
S0OE
Transmit Shift
Register
S0TBUF
B
’). Parity may be odd or
C164CM/C164SM
÷ 16
S0RIR
S0TIR
S0EIR
B
’), or 7 data bits D6
Derivatives
V1.0, 2002-02
Receive Int.
Request
Transmit Int.
Request
Error Int.
Request
TXD0
MCB02219