M55800A Atmel Corporation, M55800A Datasheet - Page 90

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

Specifications of M55800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 176
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 58
• Ext Interrupts: 58
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 72
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

WD User Interface
WD Base Address: 0xFFFF8000 (Code Label WD_BASE)
Table 12. WD Memory Map
WD Overflow Mode Register
Name:
Access:
Reset Value: 0
Offset:
• WDEN: Watch Dog Enable (Code Label WD_WDEN)
0 = Watch Dog is disabled and does not generate any signals.
1 = Watch Dog is enabled and generates enabled signals.
• RSTEN: Reset Enable (Code Label WD_RSTEN)
0 = Generation of an internal reset by the Watch Dog is disabled.
1 = When overflow occurs, the Watch Dog generates an internal reset.
• IRQEN: Interrupt Enable (Code Label WD_IRQEN)
0 = Generation of an interrupt by the Watch Dog is disabled.
1 = When overflow occurs, the Watch Dog generates an interrupt.
• EXTEN: External Signal Enable (Code Label WD_EXTEN)
0 = Generation of a pulse on the pin NWDOVF by the Watch Dog 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.
90
31
23
15
Offset
–
–
7
0x0C
0x00
0x04
0x08
AT91X40 Series
WD_OMR
Read/Write
0x00
Register
Overflow Mode Register
Clock Mode Register
Control Register
Status Register
30
22
14
–
–
6
OKEY
29
21
13
–
–
5
28
20
12
–
–
4
OKEY
EXTEN
27
19
11
–
–
3
WD_OMR
WD_CMR
WD_CR
WD_SR
Name
IRQEN
26
18
10
–
–
2
Read/Write
Read/Write
Read Only
Write Only
Access
RSTEN
25
17
–
–
9
1
1354D–ATARM–08/02
Reset State
WDEN
0
0
–
0
24
16
–
–
8
0