Hitachi H8/3692 ユーザーズマニュアル

Rev. 1.0, 07/01, page 66 of 372

Clock pulses can be supplied to the subclock divider by connecting a 32.768-kHz crystal
oscillator, as shown in figure 5-8. Figure 5-9 shows the equivalent circuit of the 32.768-kHz
crystal oscillator.

X

X

C

1

C

2

1

2

C   = C   = 15 pF (typ.)

1

2

X

1

X

2

L

S

C

S

C

O

C

O

 = 1.5 pF (typ.)

R

S

 = 14 k

Ω

 (typ.)

f

W

 = 32.768 kHz

R

S

Note:  Constants are reference values.

When the subclock is not used, connect pin X

1

 to V

CL

 or V

SS

 and leave pin X

2

 open, as shown in

figure 5-10.

X

1

V

CL 

or V

SS 

X

2

Open