MC68HC912DG128 Datasheet, PDF (297/452 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Technical Data — MC68HC912DG128
Section 16. Analog-to-Digital Converter
16.1 Contents
16.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
16.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
16.4 ATD Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
16.5 ATD Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
16.2 Introduction
The MC68HC912DG128 has two identical ATD modules identified as
ATD0 and ATD1. Except for the V_DDA and V_SSA Analog supply voltage,
all pins are duplicated and indexed with ‘0’ or ‘1’ in the following
description. An ‘x’ indicates either ‘0’ or ‘1’.
The ATD module is an 8-channel, 10-bit or 8-bit, multiplexed-input
successive-approximation analog-to-digital converter. It does not
require external sample and hold circuits because of the type of charge
redistribution technique used. The ATD converter timing can be
synchronized to the system P clock. The ATD module consists of a 16-
word (32-byte) memory-mapped control register block used for control,
testing and configuration.
MC68HC912DG128 — Rev 3.0
MOTOROLA
Analog-to-Digital Converter
For More Information On This Product,
Go to: www.freescale.com
Technical Data
297