ATMEGA16HVA-4TU Atmel, ATMEGA16HVA-4TU Datasheet - Page 108

• Manufacturer Part Number: ATMEGA16HVA-4TU
• Description: MCU AVR 16K FLASH 4MHZ 28-TSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16HVA-4TU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 7
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 9 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 28-TSOP
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

108
ATmega8HVA/16HVA
• Bit 5 - CADUB: CC-ADC Update Busy
The CC-ADC operates in a different clock domain than the CPU. Whenever a new value is writ-
ten to CADCSRA or CADRC this value must be synchronized to the CCADC clock domain.
Subsequent writes to these registers will be blocked during this synchronization. Synchroniza-
tion of one of the registers will block updating of all the others. The CADUB bit will be read as
one while any of these registers is being synchronized, and will be read as zero when neither
register is being synchronized.
• Bits 4:3: CADAS[1:0]: CC-ADC Accumulate Current Select
The CADAS bits select the conversion time for the Accumulate Current output as shown in
19-1.
Table 19-1.
Note:
”Slow RC Oscillator” on page 26
• Bits 2:1: CADSI[1:0]: CC-ADC Current Sampling Interval
The CADSI bits determine the current sampling interval for the Regular Current detection as
shown in
Table 19-2.
Notes:
• Bit 0 - CADSE: CC-ADC Sampling Enable
When the CADSE bit is written to one, the ongoing CC-ADC conversion is aborted, and the
CCADC enters Regular Current detection mode.
1. The actual value depends on the actual frequency of the Slow RC oscillator, see
1. The actual value depends on the actual frequency of the Slow RC oscillator, see
2. Sampling time ~ 12 ms.
Table
CADAS[1:0]
CADSI[1:0]
Oscillator” on page 26
CC-ADC Accumulate Current Conversion Time
CC-ADC Regular Current Sampling Interval
00
01
10
11
00
01
10
11
19-2.
.
.
CC-ADC Accumulate Current
CC-ADC Regular Current
250 ms (+ sampling time)
500 ms (+ sampling time)
Sampling Interval
1s (+ sampling time)
2s (+ sampling time)
Conversion Time
125 ms
250 ms
500 ms
1s
(1)(2)
(1)
Number of CC-ADC Clock
Number of CC-ADC Clock
16384 (+ sampling time)
32768 (+ sampling time)
65536 (+ sampling time)
8192 (+ sampling time)
Cycles
Cycles
16384
32768
4096
8192
8024A–AVR–04/08
”Slow RC
Table