mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 241

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

15.7.4 ADC Voltage Reference High Pin (V
15.7.5 ADC Voltage Reference Low Pin (V
15.8 I/O Registers
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
NOTE:
V
Connect the V
be a finite current associated with V
Specifications).
Route V
capacitors as close as possible to the package.
V
to the same voltage potential as V
associated with V
These I/O registers control and monitor ADC operation:
REFH
REFL
•
•
•
•
•
•
•
•
ADC status and control register (ADSCR) — $0057
ADC clock control register (ADICLK) — $0058
ADC data register high 0 (ADRH0) — $0059
ADC data register low 0 (ADRL0) — $005A
ADC data register low 1 (ADRL1) — $005B
ADC data register low 2 (ADRL2) — $005C
ADC data register low 3 (ADRL3) — $005D
ADC auto-scan control register (ADASCR) — $005E
is the lower reference supply for the ADC. Connect the V
is the power supply for setting the reference voltage V
REFH
Analog-to-Digital Converter (ADC)
carefully for maximum noise immunity and place bypass
REFH
REFL
pin to the same voltage potential as V
REFL
REFH
(see
)
)
Section 24. Electrical
SSA
REFH
. There will be a finite current
(see
Analog-to-Digital Converter (ADC)
Section 24. Electrical
Specifications).
DDA
. There will
I/O Registers
REFH
Data Sheet
REFL
.
pin
241