RL78/G15 CHAPTER 18 OPTION BYTE
R01UH0959EJ0110 Rev.1.10 Page 650 of 765
Mar 7, 2023
Figure 18-2. Format of User Option Byte (000C1H)
Address: 000C1H
7 6 5 4 3 2 1 0
1 1 1 PORTSELB SPORS1 SPORS0 1 1
●
Setting of SPOR detection voltage
Detection voltage (V
SPOR
) Option byte setting value
Rising edge Falling edge SPORS1 SPORS0
4.28 V 4.20 V 0 0
2.90 V 2.84 V 0 1
2.57 V 2.52 V 1 0
2.16 V 2.11 V 1 1
●
P125/RESET
¯¯¯¯¯¯
/INTP1/(VCOUT0)/(VCOUT1)/(SI01)
Note 1
pin control
PORTSELB P125/RESET
¯¯¯¯¯¯
/INTP1/(VCOUT0)/(VCOUT1)/(SI01)
Note 1
pin control
0 Port function (P125/INTP1/(VCOUT0)/(VCOUT1)/(SI01)
Note 1
1 RESET
¯¯¯¯¯¯
input (internal pull-up resistor can be always connected.)
Note 1. For 20-pin products
Caution 1. Be sure to write 1 to bits 7 to 5, 1, and 0.
Caution 2. Set the detection voltage (V
SPOR
) to be within the operating voltage range.
The operating voltage range is as follows.
For CPU operating frequencies from 1 MHz to 16 MHz: V
DD
= 2.4 to 5.5 V
Remark 1. For details on the SPOR circuit, see CHAPTER 17 SELECTABLE POWER-ON-RESET CIRCUIT.
Remark 2. The detection voltage is a typical value. For details, see 23.6.4 SPOR circuit characteristics and 24.6.4
SPOR circuit characteristics.
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