XC161 Datasheet, PDF (148/419 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core Volume 2 (of 2): Peripheral Units

XC161 Derivatives
Peripheral Units (Vol. 2 of 2)
Asynchronous/Synchronous Serial Interface (ASC)
18.2
Asynchronous Operation
Asynchronous Mode supports full-duplex communication in which both transmitter and
receiver use the same data frame format and the same baudrate. Data is transmitted on
line TxD and received on line RxD. IrDA data transmission/reception is supported up to
115.2 kbit/s. Figure 18-3 shows the block diagram of the ASC when operating in
Asynchronous Mode.
CON.FDE CON.BRS
13-bit Reload Register
Fractional
MUX
Divider
f_ASC
2
f_DIV
13-bit Baudrate Timer
16 ^fBR
f_BRT
3
CON.R
Autobaud Detection
ABSTIR
ABDETIR
Autobaud
Start Int.
Autobaud
Detect Int.
CON.FE
CON.ODD CON.STP CON.PE
CON.M
CON.OE
CON.REN
CON.FEN
CON.PEN
CON.OEN
CON.LB
Shift Clock
Serial Port Control
FIFO
Shift Clock Control
RIR
TIR
TBIR
EIR
Receive Int.
Request
Transmit Int.
Request
Transmit Buffer
Int. Request
Error Int.
Request
MUX
Sampling
Receive Shift
Register
Transmit Shift
Register
IrDA
Decoding
Receive Buffer Reg.
RBUF
Transmit Buffer Reg.
TBUF
Internal Bus
IrDA
Coding
RxD ¹
MUX
1
Figure 18-3 Asynchronous Mode of Serial Channel ASC
TxD
MCA05434
User’s Manual
ASC_X, V2.0
18-5
V2.2, 2004-01