AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 58

• Manufacturer Part Number: AT83EB5114
• Manufacturer: Atmel Corporation

Specifications of AT83EB5114

• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 11
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 50
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Mask Rom (kbytes): 4
• Watchdog: Yes

ADC I/O Functions
Figure 26. ADC Description
Figure 27. Timing Diagram
Note:
58
Tsetup = 0 CLK
AIN0/P4.0
AIN1/P4.1
AIN2/P4.2
AIN3/P4.3
AIN4/P3.3
AIN5/P3.4
* gain
CONV_CK
AT89/83EB5114
ADCA.2
AC3E
ADEOC
ADSST
CONV_CK
ADEN
R
ADCON.2
SCH2
T
SETUP
100
101
000
001
010
011
ADCON.1
AINx are general I/O that are shared with the ADC channels. The channel select bit in
ADCF register define which ADC channel pin will be used as ADCIN. The remaining
ADC channels pins can be used as general purpose I/O or as the alternate function that
is available. Writings to the port registers which aren’t selected by the ADCF will not
have any effect.
Figure 27 shows the timing diagram of a complete conversion. For simplicity, the figure
depicts the waveforms in idealized form and do not provide precise timing information.
For ADC characteristics and timing parameters refer to theSection “DC Parameters for
A/D Converter”, page 88.
SCH1
ADCON.5
Sample and Hold
ADEN
CONTROL
ADCON.0
SCH0
AVSS
ADCON.3
ADSST
ADCIN
ADCON.5
ADEN
+
-
T
CONV
Vref
ADEOC
ADCON.4
R/2R DAC
VAGND
SAR
EADC
2.4V
IE1.1
10
8
2
SELREF
ADCLK.7
ADDH
ADDL
ADC
Interrupt
Request
4311C–8051–02/08