tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 24

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


(1-B) Method 2: Transferring a Programming Routine from an External Host
(1) Determine the conditions (e.g., pin states) required for the flash memory to enter User Boot mode
(2) After
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.
Also, prepare a programming routine on the host controller:
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
Transfer routine:
Programming routine:
RESET
TMP19A43FDXBG
TMP19A43FDXBG
(a) Mode Judgment Routine
(b) Transfer Routine
(a) Mode Judgment Routine
(b) Transfer Routine
Flash Memory
Flash Memory
is released, the reset procedure determines whether to put the TMP19A43FDXBG
[Reset Procedure]
[Reset Procedure]
Old Application
Old Application
Program Code
Program Code
TMP19A43 (rev2.0)3-10
Code to download new program code from a host controller
Code to download new program code from an external host
controller and re-program the flash memory
Host Controller
Host Controller
I/O
I/O
RAM
RAM
(c) Programming Routine
(c) Programming Routine
New Application
New Application
Program Code
Program Code
Conditions for
entering User Boot
mode (defined by
the user)
0 o 1 RESET
Flash Memory Operation
TMP19A43