Epson SED 1520 Series Manual do Utilizador descarregar pdf (Página 21)

21

S-MOS SYSTEMS, INC.

3.6 – 3.11 3.0 Description of Circuit Blocks

Figure 3.4. LSI containing oscillator

M/S

(CS)

OSC1

(CL)

OSC2

Master LSI

V

DD

M/S

(CS)

OSC1

(CL)

OSC2

Slave LSI

V

DD

R

f

*2

*1

Open

*1







*2

As the parasitic capacitance in this portion increases, the oscillation

frequency will shift to a lower level. The Rf must have a smaller

value than the specification.



For a system having two or more slave LSIs, a CMOS buffer

is necessary.

CL2

Y–Driver

CL

SED1521F

AA

Figure 3.5. LSI operating with external clock

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 55 56

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