S3C8847 Datasheet, PDF (17/20 Pages) Samsung semiconductor – SAM87 family of 8-bit single-chip CMOS microcontrollers

S3C8847/C8849/P8849
ELECTRICAL DATA
Table 15-7. Main Oscillator Clock Stabilization Time
(T_A = – 20 ^°C + 85 ^°C, V_DD = 4.5 V to 5.5 V)
Oscillator Symbol
Test Condition
Min Typ Max
Crystal
–
V_DD = 4.5 V to 6.0 V
–
–
20
Ceramic
(Oscillation stabilization occurs when
10
V_DD is equal to the minimum oscillator
voltage range.)
External Clock
X_IN input High and Low level width
(t_XH, t_XL)
65
–
100
Release Signal
Setup Time
t_SREL Normal operation
–
1000
–
Oscillation
Stabilization
Wait Time ⁽¹⁾
t_WAIT
CPU clock = 8 MHz; Stop mode
released by RESET
–
8.3
–
CPU clock = 8 MHz; Stop mode
(2)
released by an interrupt
Unit
ms
ns
ns
ms
NOTES:
1. Oscillation stabilization time is the time required for the CPU clock to return to its normal oscillation frequency after a
power-on occurs, or when Stop mode is released.
2. The oscillation stabilization interval is determined by the basic timer (BT) input clock setting.
Table 15-8. A/D Converter Electrical Characteristics
(T_A = – 20 ^°C to + 85 ^°C, V_DD = 4.5 V to 5.5 V, V_SS = 0 V)
Parameter
Symbol
Conditions
Min
Typ
Absolute Accuracy ⁽¹⁾
–
CPU clock = 8 MHz
–
–
Conversion Time ⁽²⁾
t_CON
t_CPU × 25
–
(3)
Analog Input Voltage
V_IAN
–
V_SS
–
Analog Input
R_AN
–
2
Impedance
Max
± 0.5
V_DD
–
NOTES:
1. Excluding quantization error, absolute accuracy values are within ± 1/2 LSB.
2. 'Conversion time' is the time required from the moment a conversion operation starts until it ends.
3. The unit t_CPU means one CPU clock period.
Unit
LSB
µs
V
MΩ
15-7