LC79451KB

No.A2223-10/38

5-5. I

(Case without the special mention VDD = +2.5V, VSS = 0V, Ta = +25°C)

Parameter

Symbol

Conditions

min

typ

max

Unit

SCL frequency

fSCL(1)

-

-

400

kHz

Start condition setup time

tSU(5)

600

-

-

ns

Start condition hold time

tHD(3)

600

-

-

ns

SDA rise time

trDA(1)

-

-

300

ns

SDA fall time

tfDA(1)

-

-

300

ns

SCL rise time

trCL(1)

-

-

300

ns

SCL fall time

tfCL(1)

-

-

300

ns

SCL low pulse width

tPW(3)

1300

-

-

ns

SCL high pulse width

tPW(2)

600

-

-

ns

Data setup time

tSU(6)

100

-

-

ns

Data hold time

tHD(4)

0

-

900

ns

Stop condition setup time

tSU(7)

600

-

-

ns

STOP - START bus open time

tBUF

1300

-

-

ns

Fig.5. I

Output of BUSY means START Flag. During in BUSY = 1, “WAVEFORM PARAMETER” and “CONTROL

REGISTER” are write inhibit state. An internal state is charge-pump rising period before the waveform output or

during the waveform output. After outputs waveform from segment, BUSY and START Flag are automatically

canceled. (Cf. 6-3)

*1 Automatic charge-pump mode : charge-pump rising period (set to control register 1) + waveform

output period (set to waveform parameter)

Manual charge-pump mode :

waveform output period (set to waveform parameter)

*2 BUSY and START Flag are automatically canceled.

Fig.6. I

(90%)

tSU(7)

tPW(3)

tfDA(1)

tSU(5)

tHD(4)

tHD(3)

SCL

trDA(1)

SDA

trCL(1)

tfCL(1)

tPW(2)

START condition

Acknowledge (ACK)

STOP condition

tBUF

tSU(6)

(90%)

(10%)

(10%)

SCL

BUSY

START Flag

*1

(ACK)

*2