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8XC196MC, MD, MH USER’S MANUAL
C-8
AD_RESULT (Write)
AD_RESULT (Write)
Address:
Reset State (MC, MD):
Reset State (MH):
1FAAH
FFC0H
7FC0H
The high byte of the A/D result (AD_RESULT) register can be written to set the reference voltage for
the A/D threshold-detection modes.
15 8
REFV7 REFV6 REFV5 REFV4 REFV3 REFV2 REFV1 REFV0
7 0
— — — — — — — —
Bit
Number
Bit
Mnemonic
Function
15:8 REFV7:0 Reference Voltage
These bits specify the threshold value. This selects a reference voltage
that is compared with an analog input pin. When the voltage on the
analog input pin crosses over (detect high) or under (detect low) the
threshold value, the A/D conversion complete interrupt pending bit is set.
Use the following formula to determine the value to write to this register
for a given threshold voltage.
7:0 — Reserved; for compatibility with future devices, write zeros to these bits.
reference voltage
desired threshold voltage 256×
V
REF
ANGND–
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