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ST7DALI Datasheet(PDF) 61 Page - STMicroelectronics

Part No. ST7DALI
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST7DALI
61/141
12-BIT AUTORELOAD TIMER (Cont’d)
AUTORELOAD REGISTER (ATRH)
Read / Write
Reset Value: 0000 0000 (00h)
AUTORELOAD REGISTER (ATRL)
Read / Write
Reset Value: 0000 0000 (00h)
Bits 11:0 = ATR[11:0] Autoreload Register.
This is a 12-bit register which is written by soft-
ware. The ATR register value is automatically
loaded into the upcounter when an overflow oc-
curs. The register value is used to set the PWM
frequency.
PWM OUTPUT CONTROL REGISTER
(PWMCR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = OE[3:0] PWMx output enable.
These bits are set and cleared by software and
cleared by hardware after a reset.
0: PWM mode disabled. PWMx Output Alternate
Function disabled (I/O pin free for general pur-
pose I/O)
1: PWM mode enabled
PWMx CONTROL STATUS REGISTER
(PWMxCSR)
Read / Write
Reset Value: 0000 0000 (00h)
Bits 7:2= Reserved, must be kept cleared.
Bit 1 = OPx PWMx Output Polarity.
This bit is read/write by software and cleared by
hardware after a reset. This bit selects the polarity
of the PWM signal.
0: The PWM signal is not inverted.
1: The PWM signal is inverted.
Bit 0 = CMPFx PWMx Compare Flag.
This bit is set by hardware and cleared by software
by reading the PWMxCSR register. It indicates
that the upcounter value matches the DCRx regis-
ter value.
0: Upcounter value does not match DCR value.
1: Upcounter value matches DCR value.
BREAK CONTROL REGISTER (BREAKCR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:6 = Reserved. Forced by hardware to 0.
Bit 5 = BA Break Active.
This bit is read/write by software, cleared by hard-
ware after reset and set by hardware when the
BREAK pin is low. It activates/deactivates the
Break function.
0: Break not active
1: Break active
15
8
0
0
0
0
ATR11 ATR10
ATR9
ATR8
70
ATR7
ATR6
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
70
0OE3
0OE2
0OE10OE0
76
0
0
000
00
OPx
CMPFx
70
0
0
BA
BPEN
PWM3
PWM2
PWM1
PWM0
1




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