R8C2H datasheet(85/367 Pages) RENESAS

85 / 367 page

R8C/2H Group, R8C/2J Group

7. Comparator

Rev.1.00

Mar 28, 2008

Page 65 of 341

REJ09B0388-0100

Figure 7.13

Operating Example of Comparator 1 (When Digital Filter Disabled)

VW1C3 bit

VW1C2 bit

When the VW1C1 bit is set to 1

(digital filter disabled), the VCAC1

bit is set to 0 (one edge), and

the VW1C7 bit is set to 0 (VCMP1

reaches reference voltage or above)

VW1C2 bit

When the VW1C1 bit is set to 1

(digital filter disabled) and the

VCAC1 bit is set to 1 (both edges)

Set to 0 by a program

When the VW1C1 bit is set to 1

(digital filter disabled), the VCAC1

bit is set to 0 (one edge), and

the VW1C7 bit is set to 1 (VCMP1

reaches reference voltage or below)

VCOUT1 output

(LCM1POR = 0)

IR bit in

VCMP1IC register

(IRQ1SEL = 1)

VCOUT1 output

(LCM1POR = 0)

IR bit in

VCMP1IC register

(IRQ1SEL = 1)

Set to 0 by interrupt request

acknowledgement, or by a program

IR bit in

VCMP1IC register

(IRQ1SEL = 1)

VCOUT1 output

(LCM1POR = 1)

Set to 0 by interrupt request

acknowledgement, or by a program

The above applies under the following conditions.

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

• VW1C0 bit in VW1C register = 1 (comparator 1 interrupt enabled)

• CM1OE bit in ALCMR register = 1 (output enabled)

• VCAB5 bit in VCAB register = 1 (VCMP1 pin input)

• COMPSEL bit in PINSR4 register = 1 (comparator 1, comparator 2 selected)

VW1C1, VW1C2, VW1C3, VW1C7: Bits in VW1C register

VCAC1: Bit in VCAC register

LCM1POR, IRQ1SEL: Bits in ALCMR register

Reference voltage

VCMP1

Set to 0 by interrupt request

acknowledgement, or by a program

R8C2H Datasheet(PDF) 85 Page - Renesas Technology Corp

R8C2H Datasheet(HTML) 85 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