Rainbow Electronics DS2784 User Manual

Page 35

DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication

Table 12. Guide to Function Command Requirements

COMMAND

ISSUE MEMORY

ADDRESS

ISSUE 00h

BEFORE READ

READ/WRITE

TIME SLOTS

Write Challenge

—

Write: 64

Compute MAC

—

Yes

Read: up to 160

Compute Next Secret

—

Clear/Lock Secret, Set/Clear
Overdrive

— — —

Read Data

8 bits

—

Read: up to 2048

Write Data

8 bits

—

Write: up to 2048

Copy Data

8 bits

—

Recall Data

8 bits

—

Lock 8

bits

—

Reset —

—

Figure 9. Compute MAC Function Command

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