TS68HC901 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TS68HC901' PDF : 42 Pages View PDF
TS68HC901
INTRODUCTION
The TS68HC901 multi-function peripheral (CMFP)
is a member of the 68000 peripherals. The CMFP
directly interfaces to the 68000 processor via an a-
synchronous bus structure. Both vectored and pol-
led interrupt schemes are supported, with the CMFP
providing unique vector number generation for each
of its 16 interrupt sources. Additionally, handshake
lines are provided to facilitate DMAC interfacing. Re-
fer to block diagram of the TS68HC901.
The TS68HC901 performs many of the functions
common to most microprocessor-based systems.
The resources available to the user include:
. Eight Individually Programmable I/O Pins with In-
terrupt Capability
. 16-Source Interrupt Controller with Individual
Source Enabling and Masking
. Four Timers, Two of which are Multi-Mode Ti-
mers
Figure 1: TS68HC901 Block Diagram
. Timers may be used as Baud Rate Generators
for the Serial Channel
. Single-Channel Full-Duplex Universal Synchro-
nous / Asynchronous Receiver-Transmitter (U-
SART) that Supports Asynchronous and with the
Addition of a Polynomial Generator Checker
Supports Byte Synchronous Formats
By incorporating multiple functions within the CMFP,
the system designer retains flexibility while minimi-
zing device count.
From a programmer’s point of view, the versatility of
the CMFP may be attributed to its register set. The
registers are well organized and allow the CMFP to
be easily tailored to a variety of applications. All of
the 24 registers are also directly addressable which
simplifies programming. The register map is shown
in Figure 2.
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