AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 15

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

6.2.1
Table 6-2.
6048B–ATARM–29-Jun-06
Code
f
f
Wlow
j
n
K
I
CK
CKR
CK
P
0
PLL Characteristics
PLL Characteristics
Parameter
Input frequency
Output frequency
Duty cycle
Jitter
Division ratio
V
CHP current
CO
gain
Where:
Stability can be improved with an additional capacitor C
that:
Equation 2:
Equation 3:
Where:
Phase jitter for the PLL is 200 ps typical.
• K
• I
• n is the division ratio of the divider (i.e., PLL multiplication factor)
• f
max. 800 µA)
P
CKR
0
is the peak current delivered by the charge pump into the filter (typ. 350 µA, min. 50 µA,
is the PLL V
is the PLL input frequency (i.e., MCK).
CO
Conditions
With ratio 1:1
gain (typ 105.10
---------------------------------- -
n
K
0
4
C
3
+
C
------
C
I
p
4
3
C
4
6
15
Hz/V, min 65.10
---------------------- -
0.02
Min
1:1
20
65
50
5
f
CKR
6
3
Hz/V, max 172.10
. The value of C
Typ
200
105
350
50
AT91SAM7A1
1:1024
Max
172
800
30
30
3
6
must be chosen so
Hz/V)
MHz/V
MHz
MHz
Unit
mA
ps
%
15