71M6521DEIM-DB Maxim Integrated Products, 71M6521DEIM-DB Datasheet - Page 54

• Manufacturer Part Number: 71M6521DEIM-DB
• Description: Power Management Modules & Development Tools 71M6521DE DEMO BOARD M6521DE DEMO BOARD
• Manufacturer: Maxim Integrated Products

Specifications of 71M6521DEIM-DB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The interrupt service routine includes a loop. Without this loop, there is the chance of a rare, subtle timing error
because interrupt EXT6 is edge-triggered and the two interrupt sources "or" into it. The timing error will occur if the
Revision 1.7
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Reset XFER_BUSY watchdog
Copy data from CE DRAM to
Configure for alt mux cycle
Accumulate pulse counts
IE_RTC or IE_XFER?
XFER_busy_rtc_int()
Apply creep threshold
Figure 5-9: XFER_BUSY/RTC ISR
Not first CE pass?
Clock compensation
alt mux cycle?
Watchdog reset
Clear IE_XFER
Clear IE_RTC
IE_XFER?
yes
IE_RTC?
IRAM
TERIDIAN Proprietary
yes
yes
yes
yes
yes
END
no
no
no
no
Decrement ce_first_pass
ce_first_pass = 0?
Enable pulses
yes
71M652X Software User’s Guide
no
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