SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 222

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

11.2
Synchronous mode supports half-duplex communication, primarily for simple IO
expansion via shift registers. Data is transmitted and received via pin RXD0, while pin
TXD0 outputs the shift clock. These signals are alternate port functions. Synchronous
mode is selected with S0M = ‘000
8 data bits are transmitted or received synchronous to a shift clock generated by the
internal baud rate generator. The shift clock is active only as long as data bits are
transmitted or received.
Figure 11-5 Synchronous Mode of Serial Channel ASC0
User’s Manual
RXD0
TXD0
Transmit
Receive
CPU
Clock
Synchronous Operation
0
1
MUX
S0R
S0REN
S0OEN
S0LB
Receive Buffer Reg.
÷ 2
Receive Shift
B
’.
S0RBUF
Register
Asynchronous/Synchronous Serial Interface
S0M = 000B
11-8
Shift Clock
Serial Port Control
Baud Rate Timer
Reload Register
Internal Bus
Clock
S0OE
Transmit Buffer Reg.
Transmit Shift
Register
S0TBUF
C164CM/C164SM
S0RIR
÷ 4
S0TIR
S0EIR
Derivatives
V1.0, 2002-02
Receive Int.
Request
Transmit Int.
Request
Error Int.
Request
MCB02220