ESC1621 datasheet(6/7 Pages) ETC

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ESC1621

p. 6

Last update: 2004-03-05 12:13

A.C. Characteristics

Test Conditions

Sym.

Parameter

VDD

Conditions

Min.

Typ.

Max.

Unit

—

256

—

kHz

fSYS1 System Clock

On-chip RC oscillator

—

256

—

kHz

—

32.768

—

kHz

fSYS2 System Clock

Crystal oscillator

—

32.768

—

kHz

—

256

—

kHz

fSYS3 System Clock

External clock source

—

256

—

kHz

On-chip RC oscillator

—

FSYS1/1024

—

Crystal oscillator

—

FSYS2/128

—

fLCD LCD Clock

—

External clock source

—

FSYS3/1024

—

tCOM LCD Common Period

n: Number of COM

—

n/fLCD

—

150

kHz

fCLK1 Serial Data Clock (WR Pin)

Duty cycle 50%

—

300

kHz

—

kHz

fCLK2 Serial Data Clock (RD Pin)

Duty cycle 50%

—

150

kHz

fTONE Tone Frequency

On-chip RC oscillator

—

2.0 or 4.0

—

kHz

tCS

Serial Interface Reset Pulse Width

(Figure 3)

—

250

—

Write mode

3.34

—

Read mode

6.67

—

µs

Write mode

1.67

—

tCLK

WR,

RD Input Pulse Width

(Figure 1)

Read mode

3.34

—

µs

tr, tf

Rise/Fall Time Serial Data Clock

Width

(Figure 1)

—

120

—

tsu

Setup Time for DATA to

WR,

Clock Width

(Figure 2)

—

120

—

Hold Time for DATA to

WR,

Clock Width

(Figure 2)

—

120

—

tsu1

Setup Time for

CS to WR,

Clock Width

(Figure 3)

—

100

—

th1

Hold Time for

CS to WR,

Clock Width

(Figure 3)

—

100

—

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