tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 21

• Manufacturer Part Number: tmp19a43fd
• Description: 32-bit Risc Microprocessor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

User Boot Mode
(1-A) Method 1: Storing a Programming Routine in the Flash Memory
(1) Determine the conditions (e.g., pin states) required for the flash memory to enter User Boot mode
(2) After
x
x
x
and the I/O bus to be used to transfer new program code. Create hardware and software
accordingly. Before installing the TMP19A43FDXBG on a printed circuit board, write the
following program routines into an arbitrary flash block using programming equipment.
flash memory in User Boot mode. If mode switching conditions are met, the flash memory enters
User Boot mode. (All interrupts including NMI must be globally disabled while in User Boot
mode.)
Mode judgment routine: Code to determine whether or not to switch to User Boot mode
Programming routine:  Code to download new program code from a host controller and re-
Copy routine:
RESET
(a) Mode Judgment Routine
(b) Programming Routine
(c) Copy Routine
(a) Mode Judgment Routine
(b) Programming Routine
(c) Copy Routine
TMP19A43FDXBG
TMP19A43FDXBG
Flash Memory
Flash Memory
[Reset Procedure]
[Reset Procedure]
Old Application
Old Application
Program Code
Program Code
is released, the reset procedure determines whether to put the TMP19A43FDXBG
TMP19A43 (rev2.0)3-7
program the flash memory 
Code to copy the flash programming routine from the
TMP19A43FDXBG flash memory to either the TMP19A43FDXBG
on-chip RAM or external memory device.
Host Controller
Host Controller
I/O
I/O
RAM
RAM
New Application
New Application
Program Code
Program Code
0 o 1 RESET
Conditions for
entering User Boot
mode (defined by
the user)
Flash Memory Operation
TMP19A43