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ST92195D Datasheet(PDF) 206 Page - STMicroelectronics

Part # ST92195D
Description  48-96 Kbyte ROM HCMOS MCU WITH ON-SCREEN DISPLAY AND TELETEXT DATA SLICER
PDF  249 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST92195D Datasheet(HTML) 206 Page - STMicroelectronics

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ST92195C/D - PWM GENERATOR
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.
7.13.2 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.
Figure 112. PWM Action When Compare Register = 0 (no complement)
Figure 113. PWM Action When Compare Register = 3 (no complement)
Register
Address
Register
Function
R240
CM0
Ch. 0 Compare Register
R241
CM1
Ch. 1 Compare Register
R242
CM2
Ch. 2 Compare Register
R243
CM3
Ch. 3 Compare Register
R244
CM4
Ch. 4 Compare Register
R245
CM5
Ch. 5 Compare Register
R246
CM6
Ch. 6 Compare Register
R247
CM7
Ch. 7 Compare Register
R248
ACR
Autoclear Register
R249
CRR
Counter Read Register
R250
PCTLR
Prescaler/ Reload Reg.
R251
OCPLR
Output Complement Reg.
R252
OER
Output Enable Register
R253- R255
—
Reserved
VR0A1814
PWM
CLOCK
PWM
OUTPUT
Counter=Autoclear value
Counter=0
Counter=1
VR001814
PWM
CLOCK
PWM
OUTPUT
Counter=Autoclear value
Counter=0
Counter=3



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