M55800A Atmel Corporation, M55800A Datasheet - Page 60

• 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

Figure 12-7. Shut-down and Wake-up Features
12.7
60
Alarm
AT91M5880A
Power
Supply
Resistor
required by
some DC/DC
Converters
DC/DC Converter
SHD
To accommodate the different types of main power supply available, and different signals that
can command the shut-down of this device, tri-state, level 0 and level 1 are user-definable for
the Shut-down pin. The Wake-up pin can be configured as detected on the positive or negative
edge, and at high or low level. They are selected by the SHDALS and WKACKS fields in
APMC_PMR.
If the Shut-down feature is not used, the pin SHDN can be used as an Alarm Output Signal from
the RTC Alarm. The Alarm State corresponds to Shut-down, and the Acknowledge or Non-Alarm
State corresponds to Wake-up.
The alarm control logic is the same as that for Shut-down. The SHDALC command in
APMC_PCR (defined by the field SHDALS in APMC_PMR) and the WKACKS command in
APMC_PCR (defined by the field WKACKS field in APMC_PMR) control the SHDN pin.
The alarm can be positioned by an RTC Alarm and be acknowledged by a programmable edge
on the WAKEUP pin. The Backup Reset initializes the logic in Non-Alarm State.
Main Start Up
Battery
Backup
Shut-down
Jumper
Disable
+
-
VDDIO
VDDCORE
GND
VDDBU
NRSTBU
GNDBU
SHDN
WAKE-UP
AT91M55800
1745F–ATARM–06-Sep-07