AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 69

• 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

13.4.2
Register Name:
Access Type:
• URSTS: User Reset Status
0 = No high-to-low edge on NRST happened since the last read of RSTC_SR.
1 = At least one high-to-low transition of NRST has been detected since the last read of RSTC_SR.
• BODSTS: Brownout Detection Status
0 = No brownout high-to-low transition happened since the last read of RSTC_SR.
1 = A brownout high-to-low transition has been detected since the last read of RSTC_SR.
• RSTTYP: Reset Type
Reports the cause of the last processor reset. Reading this RSTC_SR does not reset this field.
• NRSTL: NRST Pin Level
Registers the NRST Pin Level at Master Clock (MCK).
• SRCMP: Software Reset Command in Progress
0 = No software command is being performed by the reset controller. The reset controller is ready for a software command.
1 = A software reset command is being performed by the reset controller. The reset controller is busy.
0
0
0
1
1
31
23
15
–
–
–
7
–
RSTTYP
Reset Controller Status Register
0
1
1
0
0
0
0
1
0
1
30
22
14
–
–
–
6
–
RSTC_SR
Read-only
Reset Type
Power-up Reset
Watchdog Reset
Software Reset
User Reset
Brownout Reset
29
21
13
–
–
–
5
–
28
20
12
–
–
–
4
–
Comments
VDDCORE rising
Watchdog fault occurred
Processor reset required by the software
NRST pin detected low
BrownOut reset occurred
27
19
11
–
–
–
3
–
26
18
10
–
–
2
–
SAM7S Series [DATASHEET]
BODSTS
RSTTYP
SRCMP
6175M–ATARM–26-Oct-12
25
17
–
9
1
NRSTL
URSTS
24
16
–
8
0
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