M55800A Atmel Corporation, M55800A Datasheet - Page 250

• 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

27.6
27.7
27.8
250
SPI: SPI in Slave Mode does not Work
V
V
AT91M5880A
DDBU
DDCORE
Consumption is not Guaranteed
Current Consumption when PLL is not Used
In transmission, the data to be transmitted (written in SP_TDR) is transferred in the shift register
and, consequently, the TDRE bit in SP_SR is set to 1. Though the transfer has not begun, when
the following data are written in SP_TDR, they are also transferred into the shift register, crush-
ing the precedent data and setting the bit TDRE to 1.
No problem fix/workaround to propose.
If the PLL is not used, an excessive current consumption can be seen on V
At start-up, set the PLL on (set MUL at 2 and PLLCOUNT at 2, for example), wait for the PLL
LOCK and then disable the PLL (MUL = 0).
Problem Fix/Workaround
The battery supply voltage consumption is not guaranteed in the case of internal peripheral
accesses.
Problem Fix/Workaround
The user should minimally access the Advanced Peripheral Bus by using an interrupt-driven
driver rather than polling methods.
Problem Fix/Workaround
DDPLL
1745F–ATARM–06-Sep-07
(about 2 mA).