MC9S08SG32E1JTGR FREESCALE [Freescale Semiconductor, Inc], MC9S08SG32E1JTGR Datasheet - Page 144

• Manufacturer Part Number: MC9S08SG32E1JTGR
• Description: HCS08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 8 Analog-to-Digital Converter (S08ADC10V1)
9.6
This section contains information for using the ADC module in applications. The ADC has been designed
for integration into a microcontroller used in embedded control applications requiring an A/D converter.
9.6.1
The following sections discuss the external pins associated with the ADC module and how they should be
used for best results.
9.6.1.1
The ADC module has analog power and ground supplies (V
some devices. V
V
the analog supplies which are bonded to the same pin as the corresponding digital supply so that some
degree of isolation between the supplies is maintained.
When available on a separate pin, both V
as their corresponding MCU digital supply (V
noise immunity and bypass capacitors placed as near as possible to the package.
134
SSA
and V
Application Information
External Pins and Routing
DDA
Analog Supply Pins
SSA
are shared with the MCU digital supply pins. In these cases, there are separate pads for
is shared on the same pin as the MCU digital V
Figure 9-13. Initialization Flowchart for Example
MC9S08SG32 Data Sheet, Rev. 7
DDA
CLEAR COCO BIT
THEN ADCRL TO
INITIALIZE ADC
ADCCFG = $98
ADCSC2 = $00
ADCSC1 = $41
READ ADCRH
CONTINUE
COCO=1?
and V
DD
CHECK
RESET
and V
YES
SSA
SS
must be connected to the same voltage potential
) and must be routed carefully for maximum
NO
DDA
and V
SS
on some devices. On other devices,
SSA
) available as separate pins on
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