atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 153

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

14.16.8
7647A–AVR–02/08
PSC Control Register – PCTL
• Bit 3 – POPB: PSC B Output Polarity
If this bit is cleared, the PSC outputs B are active Low.
If this bit is set, the PSC outputs B are active High.
• Bit 2 – POPA: PSC A Output Polarity
If this bit is cleared, the PSC outputs A are active Low.
If this bit is set, the PSC outputs A are active High.
• Bit 1:0 – not use
not use
• Bit 7:6 – PPRE1:0 : PSC Prescaler Select
This two bits select the PSC input clock division factor. All generated waveform will be modified
by this factor.
Table 14-11. PSC Prescaler Selection
• Bit 5 – PCLKSEL: PSC Input Clock Select
This bit is used to select between CLK
Set this bit to select the fast clock input (CLK
Clear this bit to select the slow clock input (CLK
• Bit 4:2 – not use
not use
• Bit 1 – PCCYC: PSC Complete Cycle
When this bit is set, the PSC completes the entire waveform cycle before halt operation
requested by clearing PRUN.
• Bit 0 – PRUN : PSC Run
Writing this bit to one starts the PSC.
Bit
Read/Write
Initial Value
PPRE1
0
0
1
1
PPRE0
0
1
0
1
PPRE1
R/W
7
0
PPRE0
R/W
6
0
Description
No divider on PSC input clock
Divide the PSC input clock by 4
Divide the PSC input clock by 32
Divide the PSC clock by 256
PCLKSEL
R/W
5
0
PLL
or CLK
R
4
0
-
PLL
).
IO
IO
).
clocks.
3
R
0
-
ATmega32/64/M1/C1
R
2
0
-
PCCYC
R/W
1
0
PRUN
R/W
0
0
PCTL
153