tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 384

• Manufacturer Part Number: tmp1940cyaf
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3.5.1
General Procedure: Using the Program in the On-Chip Boot ROM
(1) The flash block containing the older version of the program code need not be erased before
(2) Reset the TMP1940FDBF with the mode setting pins held at appropriate logic values, so that the
executing the programming routine. Since a programming routine and programming data are
transferred via the SIO0, the SIO0 must be connected to a host controller. Prepare a programming
routine on the host controller.
CPU re-boots from the on-chip boot ROM. The 12-byte password transferred from the host
controller is first compared to the contents of special flash memory locations. (If the flash block
has already been erased, the password is 0xFFFF.)
TMP1940FDBF
Old Application Program
Old Application Program
TMP1940FDBF
Code (or Erased State)
Code (or Erased State)
Flash Memory
Flash Memory
Boot ROM
Boot ROM
TMP1940FDBF-26
Host Controller
Host Controller
I/O
I/O
SIO0
SIO0
RAM
RAM
(a) Programming Routine
(a) Programming Routine
New Application
New Application
Conditions for
entering Single Boot
mode
Program Code
Program Code
0
1 RESET
TMP1940FDBF