LC87F1HC8SA

No.A1095-13/27

Allowable Operating Conditions at Ta = -40°C to +85°C, VSS1 = VSS2 = VSS3 = 0V

Specification

Parameter

Symbol

Pin/Remarks

Conditions

VDD[V]

min

typ

max

unit

0.245µs

≤ tCYC ≤ 200µs

3.0

5.5

Operating

supply voltage

(Note 2-1)

VDD(1)

VDD1=VDD2=VDD3

0.490µs

≤ tCYC ≤ 200µs Except

in onboard programming mode

2.7

5.5

Memory

sustaining

supply voltage

VHD

VDD1=VDD2=VDD3

RAM and register contents

sustained in HOLD mode.

2.0

5.5

VIH(1)

Ports 0, 1, 2, 3

P71 to P73

P70 port input/

interrupt side

PWM0, PWM1

2.7 to 5.5

0.3VDD

+0.7

VDD

VIH(2)

Port 70 watchdog

timer side

2.7 to 5.5

0.9VDD

VDD

High level

input voltage

VIH(3)

XT1, XT2, CF1, RES

2.7 to 5.5

0.75VDD

VDD

VIL(1)

4.0 to 5.5

VSS

0.1VDD

+0.4

VIL(2)

Ports 1, 2, 3

P71 to P73

P70 port input/

interrupt side

2.7 to 4.0

VSS

0.2VDD

VIL(3)

4.0 to 5.5

VSS

0.15VDD

+0.4

VIL(4)

Port 0

PWM0, PWM1

2.7 to 4.0

VSS

0.2VDD

VIL(5)

Port 70 watchdog

timer side

2.7 to 5.5

VSS

0.8VDD

-1.0

Low level

input voltage

VIL(6)

XT1, XT2, CF1, RES

2.7 to 5.5

VSS

0.25VDD

V

3.0 to 5.5

0.245

200

Instruction

cycle time

(Note 2-2)

tCYC

Except for onboard programming

mode

2.7 to 5.5

0.490

200

μs

• CF2 pin open

• System clock frequency

division ratio=1/1

• External system clock duty

=50

±5%

3.0 to 5.5

0.1

12

External

system clock

frequency

FEXCF(1)

CF1

• CF2 pin open

• System clock frequency

division ratio=1/1

• External system clock duty

=50

±5%

2.7 to 5.5

0.1

6

MHz

FmCF(1)

CF1, CF2

When 12MHz ceramic oscillation

See Fig. 1.

3.0 to 5.5

12

FmCF(2)

CF1, CF2

When 6MHz ceramic oscillation

See Fig. 1.

2.7 to 4.5

6

FmRC

Internal RC oscillation

2.7 to 5.5

0.3

1.0

2.0

MHz

Oscillation

frequency

range

(Note 2-3)

FsX’tal

XT1, XT2

32.768kHz crystal oscillation

See Fig. 2.

2.7 to 5.5

32.768

kHz

Note 2-1: VDD must be held greater than or equal to 3.0V in the flash ROM onboard programming mode.

Note 2-2: Relationship between tCYC and oscillation frequency is 3/FmCF at a division ratio of 1/1 and 6/FmCF at

a division ratio of 1/2.

Note 2-3: See Tables 1 and 2 for the oscillation constants.