MC912DG128A Motorola, MC912DG128A Datasheet - Page 311

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

1-atd
MOTOROLA
Contents
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
ATD Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
ATD Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
The MC68HC912DT128A has two identical ATD modules identified as
ATD0 and ATD1. Except for the V
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.
Analog-To-Digital Converter (ATD)
Analog-To-Digital Converter (ATD)
DDA
Analog-To-Digital Converter
and V
SSA
MC68HC912DT128A Rev 2.0
Analog supply voltage,
311