R5F2L387BNFP 参数 Datasheet PDF下载

Under development

Preliminary specification

Specifications in this manual are tentative and subject to change.

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,

R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group

6. Voltage Detection Circuit

6.3

6.3.1

VCC Input Voltage

Monitoring Vdet0

Vdet0 cannot be monitored.

6.3.2

Monitoring Vdet1

Once the following settings are made, the comparison result of voltage monitor 1 can be monitored by the

VW1C3 bit in the VW1C register after td(E-A) has elapsed (refer to

(1) Set bits VD1S3 to VD1S0 in the VD1LS register (voltage detection 1 detection voltage).

(2) Set the VCA21 bit in the VCA2 register to 0 (internal reference voltage).

(3) Set the VCA22 bit in the VCA2 register to 0 (VCC voltage).

(4) Set the VCA26 bit in the VCA2 register to 1 (voltage detection 1 circuit enabled).

6.3.3

Monitoring Vdet2

Once the following settings are made, the comparison result of voltage monitor 2 can be monitored by the

VCA13 bit in the VCA1 register after td(E-A) has elapsed (refer to

(1) Set the VCA23 bit in the VCA2 register to 0 (internal reference voltage).

(2) Set the VCA24 bit in the VCA2 register to 0 (VCC voltage), or 1 (LVCMP2 pin input voltage).

(3) Set the VCA27 bit in the VCA2 register to 1 (voltage detection 2 circuit enabled).

REJ09B0441-0010 Rev.0.10

Page 72 of 809

Jul 30, 2008