TC11IB datasheet(30/108 Pages) INFINEON

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TC11IB

Data Sheet

V2.3, 2003-11

Serial Interfaces

The TC11IB includes three serial peripheral interface units:

– Asynchronous/Synchronous Serial Interface (ASC)

– High-Speed Synchronous Serial Interface (SSC)

– Asynchronous Serial Interface (16X50)

Asynchronous/Synchronous Serial Interface

Figure 5 shows a global view of the functional blocks of the Asynchronous/Synchronous

Serial interface ASC.

Figure 5

General Block Diagram of the ASC Interfaces

ASC Module communicates with the external world via one pair of I/O lines. The RXD

line is the receive data input signal (in Synchronous Mode also output). TXD is the

transmit output signal. Clock control, address decoding, and interrupt service request

control are managed outside the ASC Module kernel.

The Asynchronous/Synchronous Serial Interface provides serial communication

between the TC11IB and other microcontrollers, microprocessors or external

peripherals.

The

ASC

supports

full-duplex

asynchronous

communication

and

half-duplex

synchronous communication. In Synchronous Mode, data is transmitted or received

synchronous to a shift clock which is generated by the ASC internally. In Asynchronous

Mode, 8-bit or 9-bit data transfer, parity generation, and the number of stop bits can be

selected. Parity, framing, and overrun error detection are provided to increase the

reliability of data transfers. Transmission and reception of data are double-buffered. For

multiprocessor communication, a mechanism is included to distinguish address bytes

from data bytes. Testing is supported by a loop-back option. A 13-bit baud rate generator

M C B 0 49 38

Clo c k

Co n tro l

A d dres s

De c o d e r

In te rru p t

Co n tro l

ASC

AS C

Mo d u le

Po rt

C ontro l

P 1 .6 /

ASC _ R x D

Rx D

Tx D

P 1 .7 / A S C _ T x D

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