W78C354 Datasheet, PDF (29/44 Pages) Winbond – MONITOR MICROCONTROLLER

W78C354
In the following table, in the positions marked with an "¤" one clock pulse will be added to every 16
PWM outputs.
SBRM0,
SBRM1
PWM/BRM OUTPUT CYCLE
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0000
----------------
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
-- -- -- --_¤-- --- --
- - - -_¤- - - - - - -_¤- - -
- - - -_¤- - -_¤- - -_¤- - -
- -_¤- - -_¤- - -_¤- - -_¤-
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L-2. Three-channel 8-bit and One-channel 12-bit PWM Dynamic DACs
The 8-bit PWM dynamic DACs (DDAC0-2) and 12-bit PWM dynamic DAC (BDDAC) are used to
achieve geometric compensation by generating a parabola output waveform by the integrator circuit
shown in Figure 6 and by executing the "MOV DDACn, #value," "MOV BDDAC, #value," or "MOV
DBRM, #value" instructions by a software program. The PWM waveforms and operating criteria of
the related registers are similar to those of the static DACs. The unused dynamic DACs can be used
as static DACs.
C
W78C354
2.5 V
8/12 bit DDAC
R
V _output
Figure 10. Dynamic DAC application circuit
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Publication Release Date: October 1996
Revision A1