R5F2L3ACBNFP datasheet(99/848 Pages) RENESAS

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6. Voltage Detection Circuit

REJ09B0441-0010 Rev.0.10

Jul 30, 2008

Page 63 of 809

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

Figure 6.4

Block Diagram of Voltage Monitor 2 Interrupt Generation Circuit

1/2

Voltage detection 2 circuit

VCA27

VCA13

When VCA27 bit is set to 0 (disabled),

voltage detection 2 signal is driven high.

Voltage

detection 2

signal

fOCO-S

VW2F1 to VW2F0

= 00b

= 01b

= 10b

= 11b

VW2C2 bit is set to 0 (not detected) by writing 0 by a program.

When VCA27 bit is set to 0 (voltage detection 2 circuit disabled),

VW2C2 bit is set to 0.

VW2C2

VW2C3

Watchdog timer block

Watchdog timer underflow signal

VW2C3 bit is set to 0 (not detected)

by writing 0 by a program.

COMPSEL

IRQ2SEL

Maskable

interrupt signal

Non-maskable

interrupt signal

Voltage monitor 2

interrupt signal

Watchdog timer

interrupt signal

Comparator A2

interrupt signal

Voltage monitor 2 interrupt generation circuit

VW2C0 to VW2C3, VW2F0, VW2F1, VW2C6, VW2C7: Bits in VW2C

VCA13: Bit in VCA1 register

VCA23, VCA24, VCA27: Bits in VCA2 register

COMPSEL, IRQ2SEL: Bits in CMPA register

VCAC2: Bit in VCAC register

LVCMP2

VCA24 = 1

VCA24 = 0

VCC

VW2C1 = 0

VW2C1 = 1

Digital filter

Edge

selection

circuit

VW2C0

Internal reference voltage

VCA23 = 0

VCAC2

VW2C6

R5F2L3ACBNFP Datasheet(PDF) 99 Page - Renesas Technology Corp

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