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TMP19A43FD Datasheet(PDF) 21 Page - Toshiba Semiconductor

Part # TMP19A43FD
Description  32-bit RISC Microprocessor
PDF  105 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP19A43FD Datasheet(HTML) 21 Page - Toshiba Semiconductor

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TMP19A43
TMP19A43 (rev2.0)3-7
Flash Memory Operation
(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
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.
•
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-
program the flash memory
•
Copy routine:
Code to copy the flash programming routine from the
TMP19A43FDXBG flash memory to either the TMP19A43FDXBG
on-chip RAM or external memory device.
(2) After RESET is released, the reset procedure determines whether to put the TMP19A43FDXBG
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.)
TMP19A43FDXBG
Flash Memory
RAM
[Reset Procedure]
(a) Mode Judgment Routine
Old Application
Program Code
Host Controller
New Application
Program Code
I/O
(b) Programming Routine
(c) Copy Routine
TMP19A43FDXBG
Flash Memory
RAM
[Reset Procedure]
Old Application
Program Code
Host Controller
New Application
Program Code
I/O
(a) Mode Judgment Routine
(b) Programming Routine
(c) Copy Routine
0
→ 1 RESET
Conditions for
entering User Boot
mode (defined by
the user)
User Boot Mode



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