AT91SAM7SE256B-AUR Atmel, AT91SAM7SE256B-AUR Datasheet - Page 623

• Manufacturer Part Number: AT91SAM7SE256B-AUR
• Description: IC ARM7 MCU FLASH 256K 128-LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7SE256B-AUR

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: EBI/EMI, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 88
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: SAM7SE256
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: SPI, USB
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 88
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: AT91SAM7SE256B
• Supply Current (max): 60 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

40.4.3
Table 40-11. Crystal Characteristics
40.4.4
Table 40-12. XIN Clock Electrical Characteristics
Note:
6222F–ATARM–14-Jan-11
Symbol
ESR
C
C
Symbol
1/(t
t
t
t
t
t
C
C
R
V
V
I
CPXIN
CHXIN
CLXIN
CLCH
CHCL
DDBP
XIN_IL
XIN_IH
M
SHUNT
IN
IN
IN
CPXIN
1. These characteristics apply only when the Main Oscillator is in bypass mode (i.e., when MOSCEN = 0 and OSCBYPASS = 1
)
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 (SAM7SE512/256)
XIN Input Capacitance (SAM7SE32)
XIN Pull-down Resistor
V
V
Bypass Current Consumption
XIN
XIN
Input Low-level Voltage
Input High-level Voltage
Figure 40-2. XIN Clock Timing
V
XIN_IL
V
XIN_IH
t
CPXIN
Conditions
Fundamental @3 MHz
Fundamental @8 MHz
Fundamental @16 MHz
Fundamental @20 MHz
SAM7SE512/256/32 Preliminary
Conditions
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
t
CPXIN
0.7 x V
Min
t
CLCH
20.0
Min
-0.3
8.0
8.0
DDPLL
t
CPXIN
Typ
t
CHXIN
0.3 x V
Max
50.0
1.95
400
400
500
46
26
15
DDPLL
Max
200
100
80
50
8
7
t
CHCL
µW/MHz
Units
MHz
Unit
pF
pF
ns
ns
ns
ns
ns
kΩ
V
V
pF
fF
Ω
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