upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 773

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

22.4 Operation of On-Chip Debug Function
Caution:
(on-chip debug
(internal reset)
(on-chip debug reset input)
reset input)
reset input)
(external
(external reset input)
OCDM0
RESET
DRST
POC
To use the on-chip debug function in a product with a power-on clear function, input
a low level to the RESET input pin for 2,000 ms or longer after power application.
(internal reset)
OCDM0
Figure 22-4: Timing Chart of Selecting Normal Operation Mode
RESET
DRST
Figure 22-5: Timing Chart of Selecting On-Chip Debug Mode
POC
User’s Manual U16702EE3V2UD00
Chapter 22 On-Chip Debug Function
(to specify normal operation mode)
To use the on-chip debug mode by using the power-on
clear function, input the external reset signal longer than
the power-on clear detection signal (internal reset)
Write 0 from CPU
On-chip debug mode
Normal operation mode
Normal operation mode
Occurrence of power-on clear
detection signal (internal reset)
clears the OCDM0 bit to 00
(normal operation mode)
Normal operation mode
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