LC87F2J32A Datasheet, PDF (19/30 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller

LC87F2J32A
<8bits AD Converter Mode at Ta = -40 to +85°C>
Parameter
Symbol
Pin/Remarks
Conditions
Resolution
Absolute
accuracy
Conversion
time
N
ET
TCAD
Analog input
voltage range
Analog port
input current
VAIN
IAINH(1)
IAINL(1)
IAINH(2)
IAINL(2)
AN0(P00) to
AN7(P07)
AN8(P70)
AN9(P71)
AN10(XT1)
AN11(XT2)
AN12(CF1)
AN13(CF2)
analog channel
except AN12
AN12
(Note 6-1)
• See Conversion time calculation
formulas. (Note 6-2)
• See Conversion time calculation
formulas. (Note 6-2)
VAIN=VDD
VAIN=VSS
VAIN=VDD
VAIN=VSS
VDD[V]
2.4 to 5.5
2.4 to 5.5
4.0 to 5.5
3.0 to 5.5
2.4 to 3.6
2.4 to 5.5
2.4 to 5.5
2.4 to 5.5
2.4 to 5.5
2.4 to 5.5
min
20
40
250
Specification
typ
max
unit
8
bit
±1.5 LSB
90
90
μs
265
VSS
-1
-15
VDD
V
1
μA
15
Conversion time calculation formulas:
12bits AD Converter Mode: TCAD(Conversion time)= ((52/(AD division ratio))+2)×(1/3)×tCYC
8bits AD Converter Mode: TCAD(Conversion time)=((32/(AD division ratio))+2)×(1/3)×tCYC
External
oscillation
(FmCF)
Operating supply
voltage range
(VDD)
System division ratio
(SYSDIV)
Cycle time
(tCYC)
AD division
ratio
(ADDIV)
AD conversion time
(TCAD)
12bit AD
8bit AD
CF-12MHz
4.0V to 5.5V
3.0V to 5.5V
1/1
250ns
1/8
34.8μs
21.5μs
1/1
250ns
1/16
69.5μs
42.8μs
CF-10MHz
4.0V to 5.5V
3.0V to 5.5V
1/1
300ns
1/8
41.8μs
25.8μs
1/1
300ns
1/16
83.4μs
51.4μs
CF-4MHz
3.0V to 5.5V
2.4V to 3.6V
1/1
750ns
1/8
104.5μs
64.5μs
1/1
750ns
1/32
416.5μs
256.5μs
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 12-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 12-bit
conversion mode.
Power-on reset (POR) Characteristics at Ta = -40 to +85°C, VSS1 = VSS2 = VSS3 = 0V
Parameter
POR release
voltage
Symbol
Pin/Remarks
Conditions
PORRL
• 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
V
2.75
2.87
2.99
3.86V
3.73
3.86
3.99
4.35V
4.21
4.35
4.49
Detection voltage
unknown state
POUKS
• See Fig. 8.
(Note 7-2)
0.7
0.95
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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