71M6543F Datasheet, PDF (44/157 Pages) Maxim Integrated Products – Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation

71M6543F/H and 71M6543G/GH Data Sheet
IP1(SFR 0xB9) (Table 36). If requests of the same priority level are received simultaneously, an internal
polling sequence as shown in Table 37 determines which request is serviced first.
Changing interrupt priorities while interrupts are enabled can easily cause software defects. It is best
to set the interrupt priority registers only once during initialization before interrupts are enabled.
Table 35: Interrupt Priority Levels
IP1[x]
IP0[x]
Priority Level
0
0
Level 0 (lowest)
0
1
Level 1
1
0
Level 2
1
1
Level 3 (highest)
Register
IP0
IP1
Table 36: Interrupt Priority Registers (IP0 and IP1)
Address
SFR 0xA9
Bit 7
(MSB)
–
Bit 6
–
Bit 5
IP0[5]
Bit 4
IP0[4]
Bit 3
IP0[3]
Bit 2
IP0[2]
SFR 0xB9
–
–
IP1[5] IP1[4] IP1[3] IP1[2]
Bit 1
IP0[1]
IP1[1]
Bit 0
(LSB)
IP0[0]
IP1[0]
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