DS2720CU/TR Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS2720CU/TR

Efficient, Addressable Single-Cell Rechargeable Lithium Protection IC

Dallas Semiconductor -> Maxim Integrated 

DS2720

BIT 5—This bit is read only. The value of this bit is set by bit 5 of address 31h and is factory set to 0.

The value of address 31h bit 5 must not be changed.

RNAOP—Read Net Address Opcode. A value of 0 in this bit sets the opcode for the read net address

command to 33h, while a 1 sets the opcode to 39h. This bit is read-only. The desired default value should

be set in bit 4 of address 31h. The factory default for RNAOP is 0.

BIT 3—This bit is read only. The value of this bit is set by bit 3 of address 31h and is factory set to 0.

The value of address 31h bit 3 must not be changed.

X—Reserved Bits.

EEPROM REGISTER

The format of the EEPROM register is shown in Figure 6. The function of each bit is described in detail

in the following paragraphs.

Figure 6. EEPROM REGISTER FORMAT

Bit 7 Bit 6 Bit 5

EEC LOCK X

Address 07

Bit 4 Bit 3

X

X

Bit 2

X

Bit 1

BL1

Bit 0

BL0

EEC—EEPROM Copy Flag. A 1 in this read-only bit indicates that a copy data command is in progress.

While this bit is high, writes to EEPROM addresses are ignored. A 0 in this bit indicates that data can be

written to unlocked EEPROM blocks if the DS2720 is in the active mode of operation.

LOCK—EEPROM Lock Enable. When this bit is 0, the lock command is ignored. Writing a 1 to this bit

enables the lock command. After the lock command is executed, the LOCK bit is reset to 0. The LOCK

bit is a volatile R/W bit, initialized to 0 upon POR.

BL1—EEPROM Block 1 Lock Flag. A 1 in this read-only bit indicates that EEPROM block 1 (addresses

30 to 33h) is locked (read-only) while a 0 indicates block 1 is unlocked (read/write).

BL0—EEPROM Block 0 Lock Flag. A 1 in this read-only bit indicates that EEPROM block 0 (addresses

20 to 23h) is locked (read-only) while a 0 indicates block 0 is unlocked (read/write).

X—Reserved Bits.

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