M55800A Atmel Corporation, M55800A Datasheet - Page 12

• 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

APMC Characteristics
Table 12. Master Clock Source Switch Times
Backup Battery Reset Signal
Internally to the device, the NRSTBU signal is maintained low for RSTBU
Therefore, the NRSTBU signal needs to be asserted only during the V
the requirement of an NRSTBU signal assertion of 10(t
Table 13. Backup Battery Reset Signal Internal Assertion Delay
Figure 5. NRSTBU Assertion Sequence
Note:
12
From
RTC Oscillator Output
PLL Output
Main Oscillator Output
PLL Output
RTC Oscillator Output
Main Oscillator Output
PLL Output Freq. 1
Symbol
RSTBU
1. The MCKO Signal is certified to be valid at the NRSTBU Internal Signal rising edge.
1
AT91M55800A
RTC Oscillator Output
NRSTBU
Parameter
NRSTBU Internal Assertion Delay
External Signal
Internal Signal
MCK Source
MCKO
V
DDBU
To
PLL Output
RTC Oscillator Output
PLL Output
Main Oscillator Output
Main Oscillator Output
RTC Oscillator Output
PLL Output Freq. 2
(1)
0V
CPRTC
) at a minimum at V
Min
DDBU
RSTBU
1
time after the rising edge of the external signal.
power ramp up by the user. This feature covers
Typical Internal Delay
1
4 x t
3 x t
7 x t
DDBU
4 x t
5 x t
CPRTC
CPRTC
CPRTC
Switch Time
CPRTC
CPRTC
power up.
5 x t
5 x t
1
Typ
+ 3 x t
+ 3 x t
+ 3 x t
+ 3 x t
CPRTC
+ 3 x t
CPRTC
CPMAIN
CPMAIN
CPPLL2
CPPLL
CPPLL
V
1727E–ATARM–01/04
DDBU
Units
Max
s