R28 datasheet(65/473 Pages) RENESAS

65 / 473 page

R8C/28 Group, R8C/29 Group

6. Voltage Detection Circuit

Rev.2.10

Sep 26, 2008

Page 46 of 441

REJ09B0279-0210

Figure 6.14

Example of Voltage Monitor 1 Interrupt and Voltage Monitor 1 Reset Operation (N, D

Version)

Vdet1

VW1C3 bit

Internal reset signal

(VW1C6 = 1)

VCC

The above applies under the following conditions.

• VCA26 bit in VCA2 register = 1 (voltage detection 1 circuit enabled)

• VW1C0 bit in VW1C register = 1 (voltage monitor 1 interrupt and voltage monitor 1 reset enabled)

NOTE:

1. If voltage monitor 0 reset is not used, set the power supply to VCC

≥ 2.2.

2.2 V(1)

VW1C2 bit

When the VW1C1 bit is set

to 0 (digital filter enabled)

VW1C2 bit

When the VW1C1 bit is

set to 1 (digital filter

disabled) and the

VW1C7 bit is set to 0

(Vdet1 or above)

VW1C1, VW1C2, VW1C3, VW1C6, VW1C7: Bit in VW1C Register

Set to 0 by interrupt request

acknowledgement

Set to 0 by a program

Voltage monitor 1

interrupt request

(VW1C6 = 0)

Voltage monitor 1

interrupt request

(VW1C6 = 0)

VW1C2 bit

When the VW1C1 bit is

set to 1 (digital filter

disabled) and the

VW1C7 bit is set to 1

(Vdet1 or below)

Voltage monitor 1

interrupt request

(VW1C6 = 0)

Internal reset signal

(VW1C6 = 1)

Set to 0 by a program

Set to 0 by interrupt

request

acknowledgement

Set to 0 by a program

Set to 0 by interrupt

request acknowledgement

4 cycles of sampling clock of digital filter

R28 Datasheet(PDF) 65 Page - Renesas Technology Corp

R28 Datasheet(HTML) 65 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL