ATXMEGA32D4-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA32D4-CU

8/16-bit Atmel XMEGA D4 Microcontroller

Atmel Corporation 

XMEGA D4

.

Table 32-25. External clock with prescaler (1) for system clock.

Symbol Parameter

Condition

Min.

Typ.

Max. Units

1/tCK Clock frequency (2)

VCC = 1.6 - 1.8V

0

VCC = 2.7 - 3.6V

0

90

MHz

142

tCK

Clock period

VCC = 1.6 - 1.8V

11

VCC = 2.7 - 3.6V

7

tCH

Clock High Time

tCL

Clock Low Time

VCC = 1.6 - 1.8V

4.5

VCC = 2.7 - 3.6V

2.4

ns

VCC = 1.6 - 1.8V

4.5

VCC = 2.7 - 3.6V

2.4

tCR

Rise time (for maximum frequency)

1.5

tCF

Fall time (for maximum frequency)

1.5

ΔtCK Change in period from one clock cycle to the next

10

%

Notes: 1. System Clock Prescalers must be set so that maximum CPU clock frequency for device is not exceeded.

2. The maximum frequency vs. supply voltage is linear between 1.8V and 2.7V, and the same applies for all other parameters

with supply voltage conditions.

77

8135L–AVR–06/12

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