R8CSLASH15 datasheet(39/277 Pages) RENESAS

39 / 277 page

R8C/14 Group, R8C/15 Group

6. Voltage Detection Circuit

Rev.2.10

Jan 19, 2006

Page 27 of 253

REJ09B0164-0210

Figure 6.3

Block Diagram of Voltage Monitor 2 Interrupt / Reset Generation Circuit

1/2

Voltage Detection 2 Circuit

VCA27

VCC

Internal

Reference

voltage

VCA13

Noise Filter

(Filter Width: 200ns)

Voltage detection 2 signal

is held “H” when VCA27 bit

is set to “0” (disabled)

Voltage

Detection

2 signal

Digital

Filter

fRING-S

VW2F1 to VW2F0

=00b

=01b

=10b

=11b

VW2C1

VW2C2 bit is set to “0” (not detected)

by writing “0” by program.

When VCA27 bit is set to “0” (voltage

detection 2 circuit disabled), VW2C2

bit is set to “0”

VW2C2

VW2C7

VW2C3

Watchdog Timer Block

Watchdog Timer

Underflow Signal

This bit is set to “0” (not detected) by writing

“0” by program.

VW2C0

VW2C6

Non-Maskable

Interrupt Signal

Voltage Monitor 2

Interrupt Signal

Watchdog

Timer Interrupt

Signal

Oscillation Stop

Detection

Interrupt Signal

Voltage Monitor 2 Interrupt / Reset Generation Circuit

VW2C0 to VW2C3, VW2F2, VW2F1, VW2C6, VW2C7: Bits in VW2C register

VCA13: Bit in VCA1 register

VCA27: Bit in VCA2 register

Voltage

Monitor 2

Reset

Signal

R8C/15 Datasheet(PDF) 39 Page - Renesas Technology Corp

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