ATmega16HVB datasheet(112/273 Pages) ATMEL

112 / 273 page

112

8042A–AVR–07/09

ATmega16HVB/32HVB

• Bits 4:3 – CADAS1:0: CC-ADC Accumulate Current Select

The CADAS bits select the conversion time for the Accumulate Current output as shown in the

Table 19-1.

Note:

1. The actual value of depends on the actual frequency of the ”Ultra Low Power RC Oscillator” on

page 27. See Section “32.” on page 228.

• Bits 2:1 – CADSI1:0: CC-ADC Current Sampling Interval

The CADSI bits determine the current sampling interval for the Regular Current detection as

shown in the Table 19-2.

Notes:

1. The actual value of depends on the actual frequency of the ”Ultra Low Power RC Oscillator” on

page 27. See ”Electrical Characteristics” on page 228.

2. Sampling time ~ 12 ms.

• Bit 0 – CADSE: CC-ADC Sampling Enable

When the CADSE bit is written to one, the ongoing CC-ADC conversion is aborted and the CC-

ADC enters Regular Current detection mode.

19.7.2

CADCSRB – CC-ADC Control and Status Register B

• Bits 7, 3 – Res: Reserved

These bits are reserved bits in the ATmega16HVB/32HVB and will always read as zero.

• Bit 6 – CADACIE: CC-ADC Accumulate Current Interrupt Enable

When the CADACIE bit is set (one), and the I-bit in the Status Register is set (one), the CC-ADC

Accumulate Current Interrupt is enabled.

Table 19-1.

CC-ADC Accumulate Current Conversion Time

CADAS1:0

CC-ADC Accumulate Current

Conversion Time(1)

Number of CC-ADC

clock Cycles

128 ms

4096

256 ms

8192

512 ms

16384

1 s

32768

Table 19-2.

CC-ADC Regular Current Sampling Interval

CADSI1:0

CC-ADC Regular Current

Sampling Interval(1)(2)

Number of CC-ADC

clock Cycles

256 ms (+ sampling time)

8192 (+ sampling time)

512 ms (+ sampling time)

16384 (+ sampling time)

1 s (+ sampling time)

32768 (+ sampling time)

2 s (+ sampling time)

65536 (+ sampling time)

Bit

(0xE7)

–

CADACIE

CADRCIE

CADICIE

–

CADACIF

CADRCIF

CADICIF

CADCSRB

Read/Write

R/W

Initial Value

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