PCIF0 datasheet(45/294 Pages) ATMEL

Il numero della parte	PCIF0

Spiegazioni elettronici	High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture

PDF	294 Pages

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Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

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9219A–RFID–01/11

Atmel ATA5505 [Preliminary]

• Bits 5:4 – CSUT1:0: Clock Start-up Time

CSUT bits are initialized with the values of SUT Fuse bits.

In case of ‘Enable/Disable Clock Source’ command, CSUT field provides the code of the clock

start-up time. Refer to subdivisions of Section 4.2 “Clock Sources” on page 29 for code of

clock start-up times.

In case of ‘Recover System Clock Source’ command, CSUT field is not affected (no recover-

ing of SUT code).

• Bits 3:0 – CSEL3:0: Clock Source Select

CSEL bits are initialized with the values of CKSEL Fuse bits.

In case of ‘Enable/Disable Clock Source’, ‘Request for Clock Availability’ or ‘Clock Source

Switch’ command, CSEL field provides the code of the clock source. Refer to Table 4-1 on

page 29 and subdivisions of Section 4.2 “Clock Sources” on page 29 for clock source codes.

In case of ‘Recover System Clock Source’ command, CSEL field contains the code of the

clock source used to drive the Clock Control Unit as described in Figure 4-1 on page 28.

PCIF0 Scheda tecnica(PDF) 45 Page - ATMEL Corporation