AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 569

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

37.4.3
Table 37-11. Crystal Characteristics
37.4.4
Table 37-12. XIN Clock Electrical Characteristics
Note:
Symbol
ESR
C
C
Symbol
1/(t
t
t
t
t
t
C
R
V
V
I
CPXIN
CHXIN
CLXIN
CLCH
CHCL
DDBP
XIN_IL
XIN_IH
M
SHUNT
IN
IN
CPXIN
1. These characteristics apply only when the Main Oscillator is in bypass mode (i.e., when MOSCEN = 0 and OSCBYPASS = 1
Figure 37-2. XIN Clock Timing
)
Crystal Characteristics
XIN Clock Characteristics
in the CKGR_MOR register, see the Clock Generator Main Oscillator Register.
Parameter
Equivalent Series Resistor Rs
Motional capacitance
Shunt capacitance
Parameter
XIN Clock Frequency
XIN Clock Period
XIN Clock High Half-period
XIN Clock Low Half-period
Rise Time
Fall Time
XIN Input Capacitance
XIN Pull-down Resistor
V
V
Bypass Current Consumption
XIN
XIN
Input Low-level Voltage
Input High-level Voltage
V
XIN_IL
V
XIN_IH
t
CPXIN
Conditions
Fundamental @3 MHz
Fundamental @8 MHz
Fundamental @16 MHz
Fundamental @20 MHz
t
CPXIN
Conditions
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
t
CLCH
t
CPXIN
0.7 x V
Min
SAM7S Series [DATASHEET]
20.0
-0.3
Min
8.0
8.0
t
CHXIN
DDPLL
Typ
6175M–ATARM–26-Oct-12
0.3 x V
t
CHCL
Max
50.0
1.95
400
400
500
46
15
Max
DDPLL
200
100
80
50
8
7
µW/MHz
Units
MHz
Unit
ns
ns
ns
pF
kΩ
pF
V
V
W
fF
569