XC2269I Datasheet, PDF (63/134 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller

XC2269I
XC2000 Family Derivatives / Premium Line
Functional Description
3.13
Universal Serial Interface Channel Modules (USIC)
The XC2269I features the USIC modules USIC0, USIC1, USIC2, USIC3, USIC4. Each
module provides two serial communication channels.
The Universal Serial Interface Channel (USIC) module is based on a generic data shift
and data storage structure which is identical for all supported serial communication
protocols. Each channel supports complete full-duplex operation with a basic data buffer
structure (one transmit buffer and two receive buffer stages). In addition, the data
handling software can use FIFOs.
The protocol part (generation of shift clock/data/control signals) is independent of the
general part and is handled by protocol-specific preprocessors (PPPs).
The USIC’s input/output lines are connected to pins by a pin routing unit. The inputs and
outputs of each USIC channel can be assigned to different interface pins, providing great
flexibility to the application software. All assignments can be made during runtime.
Bus
Buffer & Shift Structure Protocol Preprocessors
Pins
Control 0
DBU
0
DSU
0
PPP_A
PPP_B
PPP_C
PPP_D
Control 1
DBU
1
DSU
1
PPP_A
PPP_B
PPP_C
PPP_D
fsys
Fractional
Dividers
Baud rate
Generators
Figure 8 General Structure of a USIC Module
USIC_basic.vsd
The regular structure of the USIC module brings the following advantages:
• Higher flexibility through configuration with same look-and-feel for data management
• Reduced complexity for low-level drivers serving different protocols
• Wide range of protocols with improved performances (baud rate, buffer handling)
Data Sheet
63
V1.3, 2014-07