AT91SAM7S32B-AU Atmel, AT91SAM7S32B-AU Datasheet - Page 623
AT91SAM7S32B-AU
Manufacturer Part Number
AT91SAM7S32B-AU
Description
IC MCU ARM7 32KB FLASH 48LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7S16-MU.pdf
(779 pages)
Specifications of AT91SAM7S32B-AU
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
I²C, SPI, SSC, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
21
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
8K 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
48-LQFP
Cpu Family
91S
Device Core
ARM7TDMI
Device Core Size
32b
Frequency (max)
55MHz
Interface Type
SPI/TWI/USART
Total Internal Ram Size
8KB
# I/os (max)
21
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
1.8/3.3V
Operating Supply Voltage (max)
1.95/3.6V
Operating Supply Voltage (min)
1.65/3V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
48
Package Type
LQFP
Package
48LQFP
Family Name
AT91
Maximum Speed
55 MHz
Operating Supply Voltage
1.8|3.3 V
Data Bus Width
32 Bit
Number Of Programmable I/os
21
Number Of Timers
3
For Use With
AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT91SAM7S32B-AU
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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40.6.14.2
6175K–ATARM–30-Aug-10
WDT: The Watchdog Timer Status Register and Interrupt
the user restarts the watchdog (WDDRSTT). The only way to recover from this state is a power-
on reset. The issue depends on the values of WDD and WDV in the WDT_MR register.
Two workarounds are possible.
Under certain rare circumstances, if the Watchdog Timer is used with the Watchdog Fault Inter-
rupt enabled (WDFIEN set at 1), the Watchdog Timer may trigger the interrupt (wdt_fault)
erroneously. The Watchdog Timer Status Register may be wrong also (WDERR and WDUNF).
The issue depends on the values of WDD and WDV in the WDT_MR register.
Two workarounds are possible.
1. Either do not use the Watchdog Timer with the Watchdog Reset enabled (WDRSTEN
2. or set WDD to 0xFFF and in addition use only one of the following values for WDV:
1. Either do not us the Watchdog Timer with the Watchdog fault Interrupt enabled
2. or set WDD to 0xFFF and in addition use only one of the following values for WDV:
Problem Fix/Workaround
Problem Fix/Workaround
set at 1),
0xFFF, 0xDFF, 0xBFF, 0x9FF, 0x7FF, 0x77F, 0x6FF, 0x67F, 0x5FF, 0x57F, 0x4FF,
0x47F, 0x3FF, 0x37F, 0x2FF, 0x27F, 0x1FF, 0x1BF, 0x17F, 0x13F, 0x0FF, 0x0DF, 0x0BF,
0x09F, 0x07F, 0x06F, 0x05F, 0x04F, 0x03F, 0x037, 0x02f, 0x027, 0x01F, 0x01B, 0x017,
0x013 and 0x00F.
(WDFIEN set at 1),
0xFFF, 0xDFF, 0xBFF, 0x9FF, 0x7FF, 0x77F, 0x6FF, 0x67F, 0x5FF, 0x57F, 0x4FF,
0x47F, 0x3FF, 0x37F, 0x2FF, 0x27F, 0x1FF, 0x1BF, 0x17F, 0x13F, 0x0FF, 0x0DF, 0x0BF,
0x09F, 0x07F, 0x06F, 0x05F, 0x04F, 0x03F, 0x037, 0x02f, 0x027, 0x01F, 0x01B, 0x017,
0x013 and 0x00F.
AT91SAM7S Series Preliminary
623
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