Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 64)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 64 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Registers and memory locations:
• EEDATA = SFR 0x9E
• EECTRL = SFR 0x9F
• *source = pointer to EEPROM address for read or write
• *destination = pointer to XRAM address
• count = byte count for multiple read/write
If the EEPROM interrupt service routine (INT5) returns the value 0x80 (illegal command), the loop should be exited, all
registers should be refreshed and the operation should be restarted.
EEDATA= 0xA1 (read command)
EECTRL = 0x03 (transmit data command)
interrupt rcvd?
(INT5)
count==1?
*source++ = EEDATA
EECTRL = 0x05 (stop command)
Clear all registers
End
NO
*source++ = EEDATA
EECTRL = 0x02 (multiple read with ACK command)
count- -
Figure 5-19: Multi-Byte Read