SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 193

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SAF-C164SM

Manufacturer Part Number
SAF-C164SM
Description
16-Bit CMOS Microcontroller
Manufacturer
Infineon Technologies
Datasheet
9.6
The C164CM provides an on-chip interface, the XBUS interface, via which integrated
customer/application specific peripherals can be connected to the standard controller
core. The XBUS is an internal representation of the external bus interface and is
operated in the same way.
For each peripheral on the XBUS (X-Peripheral) there is a separate address window
controlled by a register pair XBCONx/XADRSx (similar to registers BUSCONx and
ADDRSELx). Because an interface to a peripheral is represented in many cases by just
a few registers, the XADRSx registers partly select smaller address windows than the
standard ADDRSEL registers. As the XBCONx/XADRSx (register pairs control
integrated peripherals rather than externally connected ones, they are fixed by mask
programming rather than being user programmable.
X-Peripheral accesses provide the same choices as external accesses; so, these
peripherals may be bytewide or wordwide. Because the on-chip connection can be
implemented very efficiently, for performance reasons, X-Peripherals are implemented
only with a separate address bus (in demultiplexed bus mode). Interrupt nodes are
provided for X-Peripherals to be integrated.
Note: If you plan to develop a peripheral of your own to be integrated into a C164CM
User’s Manual
device to create a customer specific version, please ask for the specification of the
XBUS interface and for further support.
The XBUS Interface
9-24
External Bus Interface
C164CM/C164SM
Derivatives
V1.0, 2002-02

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