tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 594

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Mode judgment routine: Code to determine whether or not to switch to User Boot mode
Transfer routine:
Programming routine:
flash memory
Flash Memory Operation
(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 TMP19A44F 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:
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.)
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
RESET
TMP19A44F
TMP19A44F
(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 TMP19A44F flash
[Reset Procedure]
[Reset Procedure]
Old Application
Old Application
Program Code
Program Code
TMP19A44 (rev1.3)24-9
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 → 1 RESET
TMP19A44
2010-04-01