upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 194

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

13.1 Functions of Power-on-Clear Circuit
194
The power-on-clear circuit (POC) has the following functions.
• Generates internal reset signal at power on.
• Compares supply voltage (V
• Compares supply voltage (V
Cautions 1. If an internal reset signal is generated in the POC circuit, the reset control flag register
Remark This product incorporates multiple hardware functions that generate an internal reset signal. A flag that
when V
when V
DD
DD
indicates the reset cause is located in the reset control flag register (RESF) for when an internal reset
signal is generated by the watchdog timer (WDT) or low-voltage-detection (LVI) circuit. RESF is not
cleared to 00H and the flag is set to 1 when an internal reset signal is generated by WDT or LVI.
For details of RESF, see CHAPTER 12 RESET FUNCTION.
2. Because the detection voltage (V
< V
≥ V
(RESF) is cleared to 00H.
voltage in the range of 2.2 to 5.5 V.
POC
POC
.
.
CHAPTER 13 POWER-ON-CLEAR CIRCUIT
DD
DD
) and detection voltage (V
) and detection voltage (V
User’s Manual U16994EJ3V0UD
POC
) of the POC circuit is in a range of 2.1 V ±0.1 V, use a
POC
POC
= 2.1 V ±0.1 V), and generates internal reset signal
= 2.1 V ±0.1 V), and releases internal reset signal