Register Descriptions; A/D Result Registers (Adrrh, Adrrl); A/D Mode Register (Amr) - Renesas H8/3847R Series Hardware Manual

8-bit single-chip microcomputer super low power

Table of Contents

Section 12 A/D Converter

Register Descriptions

ADR8 ADR7 ADR6 ADR5

Initial value

ADRRH and ADRRL together comprise a 16-bit read-only register for holding the results of

analog-to-digital conversion. The upper 8 bits of the data are held in ADRRH, and the lower 2

bits in ADRRL.

ADRRH and ADRRL can be read by the CPU at any time, but the ADRRH and ADRRL values

during A/D conversion are not fixed. After A/D conversion is complete, the conversion result is

stored as 10-bit data, and this data is held until the next conversion operation starts.

ADRRH and ADRRL are not cleared on reset.

Initial value

AMR is an 8-bit read/write register for specifying the A/D conversion speed, external trigger

option, and the analog input pins.

Upon reset, AMR is initialized to H'30.

Rev. 6.00 Aug 04, 2006 page 420 of 680

REJ09B0145-0600

ADR4 ADR3 ADR2