ST92196A STMicroelectronics, ST92196A Datasheet - Page 215
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ST92196A
Manufacturer Part Number
ST92196A
Description
8/16-bit Mcu For Tv Applications With Up To 96k Rom, On-screen-display And 1 Or 2 Data Slicers
Manufacturer
STMicroelectronics
Datasheet
1.ST92196A.pdf
(268 pages)
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PWM GENERATOR (Cont’d)
Up to 8 PWM outputs can be selected as Alternate
Functions of an I/O port. Each output bit is inde-
pendently controlled by a separate Compare Reg-
ister. When the value programmed into the Com-
pare Register and the counter value are equal, the
corresponding output bit is set. The output bit is re-
set by a counter clear (by overflow or autoclear),
generating the variable PWM signal.
Each output bit can also be complemented or dis-
abled under software control.
Figure 96. PWM Action When Compare Register = 0 (no complement)
Figure 97. PWM Action When Compare Register = 3 (no complement)
215/268
- PWM GENERATOR
OUTPUT
OUTPUT
CLOCK
CLOCK
PWM
PWM
PWM
PWM
Counter=Autoclear value
Counter=Autoclear value
8.13.2 Register Mapping
The ST9 can have one or two PWM Generators.
Each has 13 registers mapped in page 59 (PWM0)
or page 58 (PWM1). In the register description on
the following pages, the register page refers to
PWM0 only.
R253- R255
Register
Address
R240
R241
R242
R243
R244
R245
R246
R247
R248
R249
R250
R251
R252
Counter=0
Counter=0
Register
OCPLR
PCTLR
ACR
CRR
OER
CM0
CM1
CM2
CM3
CM4
CM5
CM6
CM7
—
Ch. 0 Compare Register
Ch. 1 Compare Register
Ch. 2 Compare Register
Ch. 3 Compare Register
Ch. 4 Compare Register
Ch. 5 Compare Register
Ch. 6 Compare Register
Ch. 7 Compare Register
Autoclear Register
Counter Read Register
Prescaler/ Reload Reg.
Output Complement Reg.
Output Enable Register
Reserved
Counter=1
Counter=3
Function
VR001814
VR0A1814
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