AT91SAM7S64-MU Atmel, AT91SAM7S64-MU Datasheet - Page 62

• Manufacturer Part Number: AT91SAM7S64-MU
• Description: IC ARM7 MCU FLASH 64K 64QFN
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7S64-MU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: I²C, SPI, SSC, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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: 64-VQFN
• For Use With: AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

13.3.4.3
Figure 13-6. Brownout Reset State
62
AT91SAM7S Series Preliminary
periph_nreset
or bod_reset
Brownout Reset
proc_nreset
brown_out
(nrst_out)
RSTTYP
NRST
SLCK
MCK
When the brown_out/bod_reset signal is asserted, the Reset State Manager immediately enters
the Brownout Reset. In this state, the processor, the peripheral and the external reset lines are
asserted.
The Brownout Reset is left Y Slow Clock cycles after the rising edge of brown_out/bod_reset
after a two-cycle resynchronization. An external reset is also triggered.
When the processor reset is released, the field RSTTYP in RSTC_SR is loaded with the value
0x5, thus indicating that the last reset is a Brownout Reset.
Freq.
Any
Any
Resynch.
2 cycles
XXX
Processor Startup
= 3 cycles
EXTERNAL RESET LENGTH
8 cycles (ERSTL=2)
0x5 = Brownout Reset
6175K–ATARM–30-Aug-10