AT91M55800A-33CJ Atmel, AT91M55800A-33CJ Datasheet - Page 92

• Manufacturer Part Number: AT91M55800A-33CJ
• Description: IC ARM MCU 16BIT 176BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M55800A-33CJ

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 58
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Processor Series: AT91Mx
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 8 KB
• Interface Type: EBI, SPI, USART
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 58
• Number Of Timers: 10 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91EB55
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 8 bit, 2 Channel
• Cpu Family: AT91
• Device Core: ARM7TDMI
• Device Core Size: 32b
• Frequency (max): 33MHz
• Program Memory Size: Not Required
• Total Internal Ram Size: 8KB
• # I/os (max): 58
• Number Of Timers - General Purpose: 6
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 176
• Package Type: BGA
• For Use With: AT91EB55 - KIT EVAL FOR ARM AT91M55800A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

14.1.1
Name:
Access:
Reset Value:
Offset:
• WDEN: Watchdog Enable (Code Label WD_WDEN)
0 = Watchdog is disabled and does not generate any signals.
1 = Watchdog is enabled and generates enabled signals.
• RSTEN: Reset Enable (Code Label WD_RSTEN)
0 = Generation of an internal reset by the Watchdog is disabled.
1 = When overflow occurs, the Watchdog generates an internal reset.
• IRQEN: Interrupt Enable (Code Label WD_IRQEN)
0 = Generation of an interrupt by the Watchdog is disabled.
1 = When overflow occurs, the Watchdog generates an interrupt.
• EXTEN: External Signal Enable (Code Label WD_EXTEN)
0 = Generation of a pulse on the pin NWDOVF by the Watchdog is disabled.
1 = When an overflow occurs, a pulse on the pin NWDOVF is generated.
• OKEY: Overflow Access Key (Code Label WD_OKEY)
Used only when writing WD_OMR. OKEY is read as 0.
0x234 = Write access in WD_OMR is allowed.
Other value = Write access in WD_OMR is prohibited.
92
31
23
15
–
–
7
AT91M5880A
WD Overflow Mode Register
30
22
14
WD_OMR
Read/Write
0
0x00
–
–
6
OKEY
29
21
13
–
–
5
28
20
12
–
–
4
OKEY
EXTEN
27
19
11
–
–
3
IRQEN
26
18
10
–
–
2
RSTEN
25
17
–
–
9
1
1745F–ATARM–06-Sep-07
WDEN
24
16
–
–
8
0