HD404374FT datasheet(105/161 Pages) RENESAS

Part #	HD404374FT

Description	Low-Voltage AS Microcomputers with On-Chip A/D Converter

PDF	161 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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105 / 161 page

HD404374/HD404384/HD404389/HD404082/HD404084 Series

Rev.5.00, Sep.11.2003, page 105 of 161

A/D mode register (AMR: $028):

The A/D mode register is a 4-bit write-only register that shows the A/D converter speed setting and

information on the analog input pin specification. The A/D conversion time is selected by bit 0, and the

channel by bits 1, 2, and 3 (figure 64).

A/D start flag (ADSF: $020,2):

A/D conversion is started by writing 1 to the A/D start flag. When conversion ends, the converted data is

placed in the A/D data register and the A/D start flag is cleared at the same time. (figure 65).

Bit

Read/Write

Initial value on reset

Bit name

AMR3

AMR2

AMR1

AMR0

Analog input channel selection

No selection

AN0

AN1

AN2

AN3

AN4*

AN5*

AMR1

—

AMR2

AMR3

AMR0

A/D conversion time

65 tcyc

125 tcyc

A/D mode register (AMR: $028)

Note: * Applies to the HD404389 series. This selection is not available on the HD

404374 and HD404384 series.

Figure 64 A/D Mode Register (AMR)

HD404374FT Datasheet(PDF) 105 Page - Renesas Technology Corp