LC87F76C8A

No.A0858-13/24

Continued from preceding page.

Specification

Parameter

Symbol

Pin/Remarks

Conditions

VDD[V]

min

typ

max

unit

4.0 to 5.5

VSS

0.15VDD

+0.4

VIL(1)

• Ports 0, 3, 8

• Ports A, B, C, D

• Port L

Output disabled

2.2 to 4.0

VSS

0.2VDD

4.0 to 5.5

VSS

0.1VDD

+0.4

VIL(2)

• Port 1

• Ports 71 to 73

• Port 70 port input/

interrupt side

• Output disabled

• When INT1VTSL=0

(P71 only)

2.2 to 4.0

VSS

0.2VDD

VIL(3)

Port 71 interrupt side

• Output disabled

• When INT1VTSL=1

2.2 to 5.5

VSS

0.45VDD

VIL(4)

Port 87 small signal

input side

Output disabled

2.2 to 5.5

VSS

0.25VDD

VIL(5)

Port 70 watchdog

timer side

Output disabled

2.2 to 5.5

VSS

0.8VDD

-1.0

Low level input

voltage

VIL(6)

XT1, XT2, CF1, RES

2.2 to 5.5

VSS

0.25VDD

V

3.0 to 5.5

0.237

200

2.5 to 5.5

0.356

200

Instruction cycle

time

(Note 2-2)

tCYC

2.2 to 5.5

0.712

200

μs

3.0 to 5.5

0.1

12

2.5 to 5.5

0.1

8

• CF2 pin open

• System clock frequency

division ratio=1/1

• External system clock

DUTY50±5%

2.2 to 5.5

0.1

4

3.0 to 5.5

0.2

24.4

2.5 to 5.5

0.2

16

External system

clock frequency

FEXCF(1)

CF1

• CF2 pin open

• System clock frequency

division ratio=1/2

2.2 to 5.5

0.2

8

FmCF(1)

CF1, CF2

• 12MHz ceramic oscillation

• See figure 1.

3.0 to 5.5

12

FmCF(2)

CF1, CF2

• 8MHz ceramic oscillation

• See figure 1.

2.5 to 5.5

8

FmCF(3)

CF1, CF2

• 4MHz ceramic oscillation

• See figure 1.

2.2 to 5.5

4

FmRC

Internal RC oscillation

2.2 to 5.5

0.3

1.0

2.0

FmVMRC(1)

• Multifrequency RC source

oscillation

• VMRAJ2 to 0=4,

VMFAJ2 to 0=0,

When VMSL4M=0

2.2 to 5.5

10

FmVMRC(2)

• Multifrequency RC source

oscillation

• VMRAJ2 to 0=4,

VMFAJ2 to 0=0,

When VMSL4M=1

2.2 to 5.5

4

MHz

Oscillation

frequency range

(Note 2-3)

FsX’tal

XT1, XT2

• 32.768kHz crystal oscillation

• See figure 2.

2.2 to 5.5

32.768

kHz

OpVMRC(1)

When VMSL4M=0

2.2 to 5.5

8

10

12

Multifrequency

RC oscillation

usable range

OpVMRC(2)

When VMSL4M=1

2.2 to 5.5

3.5

4

4.5

MHz

VmADJ(1)

VMRAJn 1STEP (Wide range)

2.2 to 5.5

8

24

64

Multifrequency

RC oscillation

adjustment

range

VmADJ(2)

VMFAJn 1STEP (Narrow

range)

2.2 to 5.5

1

4

8

%

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.