Operations In The Program Loader Mode - Fujitsu FR60 Hardware Manual

CHAPTER 19 PROGRAM LOADER MODE (SUPPORTED ONLY BY THE MB91302A (IPL INTEGRATED MODEL))

19.3 Operations in the Program Loader Mode

This section describes the operations for asynchronous communication and
synchronous communication in the program loader mode.
■ Operations in the Program Loader Mode
❍ Asynchronous communication at an oscillation frequency of 17.0 MHz
Serial communication is performed in the UART ch.0 asynchronous mode (mode 0).
The baud rate is 9600 bps at a machine clock frequency of 68.0 MHz (obtained by quadrupling
an oscillation frequency of 17.0 MHz using the PLL).
The settings for serial communication are a data length of 8 bits, a stop bit length of 1 bit, no
parity, and LSB-first.
❍ Synchronous Communication
Serial communication is performed in the UART ch.0 synchronous mode (mode 2). The baud
rate can be selected freely with the clock input (SCK0) (The frequency of clock input SCK0 is
used as the baud rate as it is).
The maximum frequency of the clock input is up to 1/8 of the frequency of the peripheral
operating clock signal without exceeding 3.125 MHz.
The peripheral operating clock frequency is given by the following equation.
Peripheral operating clock frequency = machine clock frequency (obtained by quadrupling the
The settings for the serial communication are a data length of 8 bits, no parity, and LSB-first.
In either mode
• Command data (00
• Four bytes of download destination RAM address (00018000
• Downloaded four bytes (up to 000007FF
Three items of download information data are given to the FR side byte by byte, starting at the
high-order byte, and their checksum data (the lower eight bits taken from the sum of all the data
items) and entered the downloaded routine to the RAM. Then, the data to be downloaded to
internal RAM is given to the FR side byte by byte starting at the high-order byte in the same way
and checksum data is also given. Upon completion of transfer, a jump to RAM takes place and
the downloaded program is executed.
500
oscillation frequency using the PLL)/2
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H
to 000187FF )
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