Rainbow-electronics ATmega8HVD Manual de usuario descargar pdf (Pagina 112)

112

8052B–AVR–09/08

ATmega4HVD/8HVD

20.8.6 BPDOCD – Battery Protection Discharge-Over-current Detection Level Register

• Bits 7:0 – DOCDL7:0: Discharge Over-current Detection Level

These bits sets the R

SENSE

voltage level for detection of Discharge Over-current, as defined in

Table 20-4 on page 112. This register should always be written as one-hot.

Note: Due to synchronization of parameters between clock domains, a guard time of 3 ULP oscillator

cycles + 3 CPU clock cycles is required between each time the BPDOCD register is written. Any

writing to the BPDOCD register during this period will be ignored.

20.8.7 BPCOCD – Battery Protection Charge-Over-current Detection Level Register

• Bits 7:0 –COCDL7:0: Charge Over-current Detection Level

These bits sets the R

SENSE

voltage level for detection of Charge Over-current, as defined in

Table 20-4 on page 112. This register should always be written as one-hot.

Note: Due to synchronization of parameters between clock domains, a guard time of 3 ULP oscillator

cycles + 3 CPU clock cycles is required between each time the BPCOCD register is written. Any

writing to the BPCOCD register during this period will be ignored.

Bit 76543210

DOCDL[7:0] BPDOCD

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value 0 0 0 0 0 0 0 1

Bit 76543210

COCDL[7:0] BPCOCD

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value 0 0 0 0 0 0 0 1

Table 20-4. DL[7:0] with corresponding R

SENSE

Current for all Current Detection Levels

SENSE

= 10 mΩ, VREF = 1.100 ± 0.005V)

Current Protection Detection Level

DL[7:0] Min. Typ. Max.

0x01 0.5A 2.0A 3.5A

0x02 1.0A 2.5A 4.0A

0x04 1.5A 3.0A 4.5A

0x08 2.0A 3.5A 5.0A

0x10 2.5A 4.0A 5.5A

0x20 3.0A 4.5A 6.0A

0x40 3.5A 5.0A 6.5A

0x80 4.5A 6.0A 7.5A

All other values Reserved

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 167 168

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