MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 175

• Manufacturer Part Number: MC68HC711PH8
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
• Manufacturer: Motorola

The analog-to-digital (A/D) system, a successive approximation converter, uses an all-capacitive
charge redistribution technique to convert analog signals to digital values.
The A/D converter shares input pins with port E:
9.1
pins are used to input supply voltage to the A/D converter. This allows the supply voltage to be
bypassed independently. The converter does not require external sample and hold circuits
because of the type of charge redistribution technique used. A/D converter timing can be
synchronized to the system E clock, or to an internal resistor capacitor (RC) oscillator. The A/D
converter system consists of four functional blocks: multiplexer, analog converter, digital control
and result storage. Refer to Figure 9-1.
MC68HC11PH8
The A/D system is an 8-channel, 8-bit, multiplexed-input converter. The VDD AD and VSS AD
ANALOG-TO-DIGITAL CONVERTER
Overview
ANALOG-TO-DIGITAL CONVERTER
PE0
PE1
PE2
PE3
PE4
PE5
PE6
PE7
Pin
9
Alternate
function
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
MOTOROLA
TPG
9-1
9