st2024c Sitronix Technology Corporation, st2024c Datasheet - Page 35
st2024c
Manufacturer Part Number
st2024c
Description
24k 8-bit Single Chip Microcontroller
Manufacturer
Sitronix Technology Corporation
Datasheet
1.ST2024C.pdf
(54 pages)
- Current page: 35 of 54
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14.3 PWM DAC Mode Select
The PWM DAC generator has three modes, Single-pin
mode, Two-pin two ended mode and Two-pin push pull
14.3.1 Single-Pin Mode (Accurate to 7 bits)
Single-pin mode is designed for use with a single-transistor
amplifier. It has 7 bits of resolution. The duty cycle of the
PB1 is proportional to the output value. If the output value is
0, the duty cycle is 50%. As the output value increases from
0 to 63, the duty cycle goes from being high 50% of the time
Ver 2.2
PB1
High
Low
DAC = 0
64
FIGURE 14-16: Single-Pin PWM DAC Wave-form
FIGURE 14-17: Single-Pin Application Circuit
64
ST2024C
P B1
DAC = 32
96
35/54
32
mode. They are depended on the application used. The DAC
mode is controlled by DMD[1~0].
up to 100% high. As the value goes from 0 to -64, the duty
cycle decreases from 50% high to 0%. PB0 is inverse of
PB1’s waveform. Figure 13-15 shows the PB1 wave-forms.
330 ohm
32
DAC = -32
8050
96
SPK
64+X
DAC = X
(TABLE 13-31)
64-X
ST2024C
1/31/08
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