S6E2H4 Datasheet, PDF (144/160 Pages) SPANSION – fpu built-in

S6E2H4 Series
Analog signal
source
Rext
ANxx
Analog input pin
R_AIN
Comparator
C_AIN
(Equation 1) tS ≥ (RAIN + Rext ) × CAIN × 9
tS:
Sampling time
RAIN:
Input resistance of A/D = 1.2 kΩ at 4.5 V < AVCC < 5.5 V
Input resistance of A/D = 1.8 kΩ at 2.7 V < AVCC < 4.5 V
CAIN:
Input capacity of A/D = 12.05 pF at 2.7 V < AVCC < 5.5 V
Rext:
Output impedance of external circuit
(Equation 2) tC = tCCK × 14
tC:
Compare time
tCCK:
Compare clock cycle
Document Number: 001-98941 Rev.*B
Page 144 of 160