M55800A Atmel Corporation, M55800A Datasheet - Page 212
M55800A
Manufacturer Part Number
M55800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M55800A.pdf
(29 pages)
4.M55800A.pdf
(256 pages)
5.M55800A.pdf
(28 pages)
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
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21. ADC: Analog-to-digital Converter
Table 21-1.
212
Pin Name
VDDA
GNDA
ADVREF
AD0 - AD7
AD0TRIG, AD1TRIG
AT91M5880A
ADC Pin Description
The AT91M55800A features two identical 4-channel 10-bit Analog-to-digital converters (ADC)
based on a Successive Approximation Register (SAR) approach.
Each ADC has 4 analog input pins (AD0 to AD3 and AD4 to AD7), digital trigger input pins
(AD0TRIG and AD1TRIG), and provides an interrupt signal to the AIC. Both ADCs share the
analog power supply pins (VDDA and GNDA) and the input reference voltage pin (ADVREF).
Figure 21-1. Block Diagram
AD0TRIG
AD1TRIG
ADVREF
GNDA
VDDA
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
Description
Analog power supply
Analog ground
Reference voltage
Analog input channels
External triggers
Analog-to-digital Converter
Analog-to-digital Converter
ADC 0
ADC 1
ADIRQ0
ADIRQ1
Peripheral
Advanced
1745F–ATARM–06-Sep-07
APB
Bus
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