tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 589

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

(Note 1) Regarding power-on reset of devices with internal flash memory;
(Note 2) While flash programming or deletion is in progress, at least 0.5 microseconds of reset
Flash Memory Operation
24.2.1
For devices with internal flash memory, it is necessary to apply "0" to the RESET inputs
upon power on for a minimum duration of 500 microseconds regardless of the operating
frequency.
period is required regardless of the system clock frequency.
Either the Single Chip or Single Boot operation mode can be selected by externally setting the level of the
BOOT input pin while the device is in reset status.
After the level is set, the CPU starts operation in the selected operation mode when the reset condition is
removed. Regarding the TEST0, TEST1, and BOOT pins, be sure not to change the levels during operation
once the mode is selected.
The mode setting method and the mode transition diagram are shown below:
Single chip mode
Single boot mode
To reset the device, ensure that the power supply voltage is within the operating voltage range, that the
internal oscillator has been stabilized, and that the RESET input is held at "0" for a minimum duration
of 12 system clocks (1.2 μs with 10MHz oscillator operation; the "1/8" clock gear mode is applied after
reset).
Normal mode
Single chip mode
Reset Operation
User to set the
switch method
Operation mode
Table 24.2 Operation Mode Setting
Fig. 24.2 Mode Transition Diagram
Boot mode
TMP19A44 (rev1.3)24-4
User
Onboard
Programming mode
Boot mode
Single
RESET
0 to 1
0 to 1
Input pin
Reset state
BOOT
TMP19A44
1
0
2010-04-01