Atmel ATmega32M1 User Manual

154
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
• Bit 4 – PMODE PSC Mode
Select the mode of PSC.
• 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
14.16.8 PSC Control Register – PCTL
• 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.
• Bit 5 – PCLKSEL: PSC Input Clock Select
This bit is used to select between CLK
PLL
or CLK
IO
clocks.
Set this bit to select the fast clock input (CLK
PLL
).
Clear this bit to select the slow clock input (CLK
IO
).
Table 14-10. PSC Mode Selection
PMODE Description
0 One Ramp Mode (Edge Aligned)
1 Center Aligned Mode
Bit 76543210
PPRE1 PPRE0
PCLKSEL
SWAP2 SWAP1 SWAP0 PCCYC PRUN
PCTL
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value 00000000
Table 14-11. PSC Prescaler Selection
PPRE1 PPRE0 Description
0 0 No divider on PSC input clock
0 1 Divide the PSC input clock by 4
1 0 Divide the PSC input clock by 32
1 1 Divide the PSC clock by 256

Atmel ATmega32M1 Specifications

General

Brand	Atmel
Model	ATmega32M1
Category	Microcontrollers
Language	English