PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 183

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

13
The built-in bootstrap loader of the INCA-D provides a mechanism to load the startup
program, which is executed after reset, via the serial interface.
The bootstrap loader moves code/data into the internal RAM, but it is also possible to
transfer data via the serial interface into an external RAM using a second level loader
routine. It may be used to provide lookup tables or may provide “core-code”, ie. a set of
general purpose subroutines, eg. for I/O operations, number crunching, system
initialization, etc.
The boot strap loader program resides inside the internal ROM. It is used to download
an executable code into the internal memory via ASC.
The ASC bootstrap loader is similar to the loader used in the C167 microprocessor
family. However, there are some major differences:
• The baudrate error is minimized because the reload value for the baudrate generator
• The user program is started by a jump to its start address instead of a hardware or
13.1
The ASC bootstrap loader in ROM is activated by a hardware reset (pin RSTIN) under
the following conditions:
• Port 0.4 is pulled low by an external pull-down resistor.
• Port 0.3 is left open.
• Pin TEST is connected to VSS
Data Sheet
as well as the fractional divider (register S0FDV) are modified according to the
measured time of the received zero byte.
software reset.
The Bootstrap Loader
Activation of ASC Bootstrap Loader
183
The Bootstrap Loader
PSB 21473
2003-03-31
INCA-D