Section 25 Flash Memory
Rev. 1.00 Mar. 12, 2008 Page 960 of 1178
REJ09B0403-0100
After the on-chip program storage area is returned to the user-MAT space, the user
procedure program is returned.
In the download processing, the values of general registers of the CPU are held.
In the download processing, any interrupts are not accepted. However, interrupt requests
are held. Therefore, when the user procedure program is returned, the interrupts occur.
When the level-detection interrupt requests are to be held, interrupts must be input until the
download is ended.
When hardware standby mode is entered during download processing, the normal
download cannot be guaranteed in the on-chip RAM. Therefore, download must be
executed again.
Since a stack area of 128 bytes at the maximum is used, the area must be allocated before
setting the SCO bit to 1.
If a flash memory access by the DTC signal is requested during downloading, the operation
cannot be guaranteed. Therefore, an access request by the DTC signal must not be
generated.
4. FKEY is cleared to H'00 for protection.
5. The value of the DPFR parameter must be checked and the download result must be
confirmed.
Check the value of the DPFR parameter (one byte of start address of the download
destination specified by FTDAR). If the value is H'00, download has been performed
normally. If the value is not H'00, the source that caused download to fail can be
investigated by the description below.
If the value of the DPFR parameter is the same as before downloading (e.g. H'FF), the
address setting of the download destination in FTDAR may be abnormal. In this case,
confirm the setting of the TDER bit (bit 7) in FTDAR.
If the value of the DPFR parameter is different from before downloading, check the SS bit
(bit 2) and the FK bit (bit 1) in the DPFR parameter to ensure that the download program
selection and FKEY setting were normal, respectively.
6. The operating frequency is set in the FPEFEQ parameter for initialization.
The current frequency of the CPU clock is set to the FPEFEQ parameter value (general
register ER0).
The settable range of the FPEFEQ parameter is 20 to 34 MHz. When the frequency is set to
out of this range, an error is returned to the FPFR parameter of the initialization program
and initialization is not performed. For details on the frequency setting, see the description
in 25.3.2 (2) (a), Flash programming/erasing frequency parameter (FPEFEQ: general
register ER0 of CPU).
Summary of Contents for H8S Family
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Page 70: ...Section 1 Overview Rev 1 00 Mar 12 2008 Page 22 of 1178 REJ09B0403 0100...
Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
Page 116: ...Section 3 MCU Operating Modes Rev 1 00 Mar 12 2008 Page 68 of 1178 REJ09B0403 0100...
Page 152: ...Section 5 Interrupt Controller Rev 1 00 Mar 12 2008 Page 104 of 1178 REJ09B0403 0100...
Page 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Page 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Page 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Page 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Page 712: ...Section 18 I2 C Bus Interface IIC Rev 1 00 Mar 12 2008 Page 664 of 1178 REJ09B0403 0100...
Page 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Page 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Page 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Page 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Page 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
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