SH7014 datasheet(407/754 Pages) RENESAS

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13. High Speed A/D Converter

⎯ SH7014 ⎯

Rev.5.00 Sep. 27, 2007 Page 373 of 716

REJ09B0398-0500

Bit 4

⎯Clock Select (CKS): Sets the A/D conversion time. Set so that the conversion time is 2 μs

or greater in proportion to the operating frequency.

Make conversion time changes only while conversion is halted.

Bit 4

CKS

Description

Conversion time = 40 states

(high speed A/D converter standard clock =

φ/2)

(initial value)

Conversion time = 80 states (when

φ/4 is selected)

Bit 3

⎯Group Mode (GRP): Designates either select mode or group mode for the A/D

conversion channel selection.

Set the GRP bit only while conversion is halted.

Bit 3

GRP

Description

Select mode

(initial value)

Group mode

Bits 2 to 0

⎯Channel Select 2 to 0 (CH2 to CH0): These bits, along with the GRP bit, select the

analog input channel.

Set the input channel only while conversion is halted.

Description

Bit 2

CH2

Bit 1

CH1

Bit 0

CH0

Select Mode (GRP = 0)

Group Mode (GRP = 1)

AN0

(initial value) AN0

AN1

AN0 to AN1

AN2

AN0 to AN2

AN3

AN0 to AN3

AN4

AN0 to AN4

AN5

AN0 to AN5

AN6

AN0 to AN6

AN7

AN0 to AN7

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