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UPD17062 bảng dữ liệu(PDF) 219 Page - Renesas Technology Corp

tên linh kiện UPD17062
Giải thích chi tiết về linh kiện  MOS INTEGRATED CIRCUIT
PDF  298 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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UPD17062 bảng dữ liệu(HTML) 219 Page - Renesas Technology Corp

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µPD17062
Peripheral equipment
Peripheral address
Corresponding pin
PWM0
05H
PWM0
PWM1
06H
PWM1
PWM2
07H
PWM2
PWM3
08H
PWM3
17. D/A CONVERTER
17.1
PWM PINS
The
µPD17062 has 4 output pins for 6-bit PWM, which enables varying the duty cycle of the 15.625 kHz pulse
signal in 64 steps. With this capability, attaching an external lowpass filter to the
µPD17062 makes it function
as a D/A converter. The PWM pins can also be used as 1-bit output ports.
When used as a D/A converter, the
µPD17062 sets the D/A outputs in the output data latches, PWMRs. These
latches, PWMR0, PWMR1, PWMR2, and PWMR3, are mapped at addresses 05H, 06H, 07H, and 08H, respec-
tively. They can be read- and write-accessed via the DBF. Table 17-1 lists the correspondence between the
PWMR addresses and the PWM pins.
Table 17-1
PWMR Addresses and the Corresponding Pins
Each PWMR consists of 7 bits. Fig. 17-1 shows the configuration of the PWMR and its correspondence with
the DBF. The highest bit of the PWMR specifies whether the PWM pin is to be used as a PWM output pin or
an output port. The other six bits specify the output values of the PWM signal.
Fig. 17-2 shows the waveform output from the PWMR pin.



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