XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 91

• Manufacturer Part Number: XC68HC05P18A
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

Technical Data — MC68HC05P18A
11.1 Contents
11.2 Introduction
MC68HC05P18A
MOTOROLA
Section 11. Analog-to-Digital (A/D) Converter
11.2
11.3
11.3.1
11.3.2
11.3.3
11.4
11.5
11.5.1
11.5.2
11.5.3
11.6
11.7
11.8
11.9
The MC68HC05P18A includes a 4-channel, multiplexed input, 8-bit,
successive approximation analog-to-digital (A/D) converter. The A/D
subsystem shares its inputs with port C pins PC3–PC7.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Analog Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Conversion Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Digital Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
A/D Status and Control Register. . . . . . . . . . . . . . . . . . . . . . . .94
A/D Conversion Data Register . . . . . . . . . . . . . . . . . . . . . . . . .96
A/D Subsystem Operation during Wait Mode
A/D Subsystem Operation during Stop Mode. . . . . . . . . . . . . .96
Ratiometric Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Reference Supply Voltage (V
Accuracy and Precision . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Conversion Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
Internal versus External Oscillator . . . . . . . . . . . . . . . . . . . .93
Multi-Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .94
and Halt Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Analog-to-Digital (A/D) Converter
REFH
) . . . . . . . . . . . . . . . . . . .92
Technical Data
91