LC87F0808AUQFPTLM-H Datasheet, PDF (17/25 Pages) ON Semiconductor – 8-bit 1-chip Microcontroller

LC87F0808A
External
oscillation
(FmCF)
CF-20MHz
Operating supply
voltage range
(VDD)
3.3V to 5.5V
System division ratio
(SYSDIV)
1/1
Cycle time
(tCYC)
150ns
AD division ratio
(ADDIV)
10bit AD
8bit AD
1/4
1/2
AD conversion time
(TCAD)
10bit AD
8bit AD
8.5μs
2.9μs
CF-10MHz
3.3V to 5.5V
1/1
300ns
1/4
1/2
17μs
5.8μs
CF-4MHz
3.3V to 5.5V
1/1
750ns
1/4
1/2
42.5μs
14.5μs
Note 6-1: The quantization error (±1/2LSB) must be excluded from the absolute accuracy. The absolute accuracy must
be measured in the microcontroller's state in which no I/O operations occur at the pins adjacent to the analog
input channel.
Note 6-2: The conversion time refers to the period from the time an instruction for starting a conversion process till the
time the conversion results register(s) are loaded with a complete digital conversion value corresponding to
the analog input value.
The conversion time is 2 times the normal-time conversion time when:
• The first AD conversion is performed in the 10-bit AD conversion mode after a system reset.
• The first AD conversion is performed after the AD conversion mode is switched from 8-bit to 10-bit
conversion mode.
Power-on Reset (POR) Characteristics at Ta = -40°C to +85°C, VSS1=VSS2=0V
Parameter
POR release
voltage
Symbol
PORRL
Pin/Remarks
Conditions
• Select from option.
(Note 7-1)
Option selected
voltage
1.67V
1.97V
min
1.55
1.85
Specification
typ
max
unit
1.67
1.79
1.97
2.09
2.07V
1.95
2.07
2.19
2.37V
2.25
2.37
2.49
2.57V
2.87V
2.45
2.57
2.69
2.75
2.87
2.99
V
3.86V
3.73
3.86
3.99
4.35V
4.21
4.35
4.49
Detection
POUKS
• See Fig. 7.
voltage
(Note 7-2)
0.7
0.95
unknown state
Power supply
rise time
PORIS
• Power supply rise
time from 0V to 1.6V.
100
ms
Note7-1: The POR release level can be selected out of 8 levels only when the LVD reset function is disabled.
Note7-2: POR is in an unknown state before transistors start operation.
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