HD404669 Datasheet, PDF(137/142 Page) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HD404669 Datasheet, PDF (137/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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RL = 100 kâ¦

TONEC

HD404669 Series

GND

RL = 100 kâ¦

TONER

Figure 89 Tone Output Load Circuit

RL = 100 kâ¦

TONEC

GND

TONER

Figure 90 Distortion and dBCR Load Circuit

OSC1

1/fCP

VCC â 0.3 V

0.3 V

tCPH

tCPL

tCPr

tCPf

Figure 91 External Clock Timing

INT0 to INT4, EVND

0.9 VCC

tIH

tIL

0.1 VCC

Figure 92 Interrupt Timing

137

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