tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 18

• Manufacturer Part Number: tmp19a43fd
• Description: 32-bit Risc Microprocessor
• 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
3.2.1
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 (2.4 µs with 40MHz 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
x x x x x
x x x x x
x x x x x
Table 3-2 Operation Mode Setting
Fig. 3-2 Mode Transition Diagram
Boot mode
TMP19A43 (rev2.0)3-4
User
Onboard
Programming mode
Boot mode
Single
RESET
0 to 1
0 to 1
Input pin
Reset state
Flash Memory Operation
BOOT
TMP19A43
1
0