ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 33
ATmega88PA Automotive
Manufacturer Part Number
ATmega88PA Automotive
Description
Manufacturer
Atmel Corporation
- Current page: 33 of 225
- Download datasheet (4Mb)
7701E–AVR–02/11
To avoid unintentional changes of clock frequency, a special write procedure must be followed
to change the CLKPS bits:
1. Write the Clock Prescaler Change Enable (CLKPCE) bit to one and all other bits in
2. Within four cycles, write the desired value to CLKPS while writing a zero to CLKPCE.
Interrupts must be disabled when changing prescaler setting to make sure the write procedure
is not interrupted.
The CKDIV8 Fuse determines the initial value of the CLKPS bits. If CKDIV8 is unprogrammed,
the CLKPS bits will be reset to “0000”. If CKDIV8 is programmed, CLKPS bits are reset to
“0011”, giving a division factor of eight at start up. This feature should be used if the selected
clock source has a higher frequency than the maximum frequency of the device at the present
operating conditions. Note that any value can be written to the CLKPS bits regardless of the
CKDIV8 Fuse setting. The Application software must ensure that a sufficient division factor is
chosen if the selected clock source has a higher frequency than the maximum frequency of
the device at the present operating conditions. The device is shipped with the CKDIV8 Fuse
programmed.
Table 7-10.
CLKPS3
CLKPR to zero.
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Clock Prescaler Select
CLKPS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Atmel ATtiny24/44/84 [Preliminary]
CLKPS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CLKPS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Clock Division Factor
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
128
256
16
32
64
1
2
4
8
33
Related parts for ATmega88PA Automotive
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
MCU AVR 8K ISP FLSH 20MHZ 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8K ISP FLASH 20MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8K ISP FLASH 20MHZ 28DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
MCU AVR 8KB FLASH 20MHZ 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8KB FLASH 20MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
Atmega88p 8-bit Microcontroller With 8k Bytes In-system Programmable Flash
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet: