71m6543h-igtr/f Maxim Integrated Products, Inc., 71m6543h-igtr/f Datasheet - Page 44

• Manufacturer Part Number: 71m6543h-igtr/f
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

71M6543F/H Data Sheet
IP1(SFR 0xB9)
polling sequence as shown in
44
Register
IP0
IP1
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.
SFR 0xA9
SFR 0xB9
(Table
Address
36). If requests of the same priority level are received simultaneously, an internal
Table 36: Interrupt Priority Registers (IP0 and IP1)
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(MSB)
Bit 7
Table 37
–
–
IP1[x]
0
0
1
1
Table 35: Interrupt Priority Levels
Bit 6
determines which request is serviced first.
–
–
IP0[x]
0
1
0
1
IP0[5]
IP1[5]
Bit 5
Level 0 (lowest)
Level 1
Level 2
Level 3 (highest)
IP0[4]
IP1[4]
Bit 4
Priority Level
IP0[3]
IP1[3]
Bit 3
IP0[2]
IP1[2]
Bit 2
IP0[1]
IP1[1]
Bit 1
IP0[0]
IP1[0]
(LSB)
Bit 0
v1.0