H8SXSLASH1663M datasheet(1099/1504 Pages) RENESAS

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Section 22 A/D Converter

Rev. 2.00 Sep. 24, 2008 Page 1067 of 1468

REJ09B0412-0200

Section 22 A/D Converter

This LSI includes two units (units 0 and 1) of successive approximation type 10-bit A/D

converter. The A/D converter unit 0 allows up to eight analog input channels to be selected while

the A/D converter unit 1 allows up to four analog input channels to be selected.

Figures 22.1 and 22.2 show block diagrams of the A/D converter units 0 and 1, respectively.

22.1

Features

• 10-bit resolution

• Eight or four input channels (total eight input channels for the two units)

Four channels x two units (for unit 0 and unit 1)

Eight channels x one unit (for unit 0)

• Conversion time:

Unit 0: (2.7

µs per channel)

Unit 1: (2.7

µs per channel)

• Two kinds of operating modes

 Single mode: Single-channel A/D conversion

 Scan mode: Continuous A/D conversion on 1 to 4 channels, or 1 to 8 channels

• Eight data registers for the A/D converter unit 0 and four data registers for unit 1 (total eight

data registers for the two units)

Results of A/D conversion are held in a 16-bit data register for each channel.

• Sample and hold functionality

• Three types of conversion start

Conversion can be started by software, a conversion start trigger by the 16-bit timer pulse unit

(TPU)*

1 or 8-bit timer (TMR)*2, or an external trigger signal.

• Function of starting units simultaneously

A/D conversion for multiple units can be started by external trigger (ADTRG0).

• Interrupt source

A/D conversion end interrupt (ADI) request can be generated.

• Module stop state specifiable

Notes: 1. Only supported in the A/D converter unit 0.

2. For unit 0, A/D conversion can be started by a conversion start trigger by the TMR

units 0 and 1 whereas for unit 1 A/D conversion can be started by a conversion start

trigger by the TMR units 2 and 3.

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