tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 380

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

3.4.2
Method 2: Transferring a Programming Routine from an External Host
(6) Drive
(1) Determine the conditions (e.g., pin states) required for the flash memory to enter User Boot mode
Normal mode. After
code.
and the I/O bus to be used to transfer new program code. Create hardware and software
accordingly. Before installing the TMP1940FDBF on a printed circuit board, write the following
program routines into an arbitrary flash block using programming equipment.
Also, prepare a programming routine on the host controller:
Mode judgment routine: Code to determine whether or not to switch to User Boot mode
Transfer routine:
Programming routine:
RESET
TMP1940FDBF
TMP1940FDBF
(a) Mode Judgment Routine
(b) Transfer Routine
(a) Mode Judgment Routine
(b) Programming Routine
(c) Copy Routine
New Application Program
Flash Memory
Flash Memory
[Reset Procedure]
[Reset Procedure]
low to reset the TMP1940FDBF. Upon reset, the on-chip flash memory is put in
Old Application
Program Code
RESET
Code
TMP1940FDBF-22
is released, the CPU will start executing the new application program
Code to download new program code from an external host
controller and re-program the flash memory
Code to download new program code from a host controller
Host Controller
Host Controller
I/O
(I/O)
RAM
RAM
(c) Programming Routine
New Application
Program Code
0
Set to
Normal mode
TMP1940FDBF
1 RESET