ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 432

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.11.5 ADCL and ADCH – The ADC Data Register
27.11.5.1 ADLAR = 0
27.11.5.2 ADLAR = 1
432
ATmega128RFA1
This register defines the track-and-hold time for sampling the analog input voltage of
the ADC and it defines the start-up time for the analog blocks based on a number of
ADC clock cycles. The ADC clock is generated from the system clock with the ADC
prescaler. The bits ADPS2:0 of register ADCSRA set the prescaler ratio. Correct start-
up and track-and-hold times are important for precise conversion results.
• Bits 7:6 – ADTHT1:0: ADC Track-and-Hold Time
These bits define the number of ADC clock cycles for the sampling time of the analog
input voltage. For a complete description of this bit, see
Timing" on page 413.
• Bit 5 – Res0: Reserved
• Bits 4:0 – ADSUT4:0: ADC Start-up Time
These bits define the number of ADC clock cycles for the start-up time of the analog
blocks. For a complete description of this bit, see
on page
Bit
NA ($79)
NA ($78)
Read/Write
Initial Value
Bit
NA ($79)
NA ($78)
Read/Write
Initial Value
When an A/D conversion is complete, the result is found in these two registers. If
differential channels are used, the result is presented in two’s complement form.
When ADCL is read, the ADC Data Register is not updated until ADCH is read.
Consequently, if the result is left adjusted and no more than 8-bit precision (7 bit + sign
bit for differential input channels) is required, it is sufficient to read ADCH. Otherwise,
ADCL must be read first, then ADCH.
The ADLAR bit in ADMUX, and the MUXn bits in ADMUX affect the way the result is
read from the registers. If ADLAR is set, the result is left adjusted. If ADLAR is cleared
(default), the result is right adjusted.
413.
ADC7
ADC9
ADC1
15
15
R
R
R
R
7
0
0
7
0
0
–
ADC6
ADC8
ADC0
14
14
R
R
R
R
–
6
0
0
6
0
0
ADC5
ADC7
13
13
R
R
R
R
5
0
0
5
0
0
–
–
ADC4
ADC6
12
12
R
R
R
R
–
4
0
0
–
4
0
0
ADC3
ADC5
11
11
R
R
R
R
–
3
0
0
–
3
0
0
"Pre-scaling and Conversion Timing"
ADC2
ADC4
10
10
R
R
R
R
2
0
0
2
0
0
–
–
"Pre-scaling and Conversion
ADC9
ADC1
ADC3
R
R
R
R
9
1
0
0
9
–
1
0
0
8266A-MCU Wireless-12/09
ADC8
ADC0
ADC2
R
R
R
R
8
0
0
0
8
0
0
0
–
ADCH
ADCL
ADCH
ADCL