71M6541D Datasheet, PDF (26/166 Pages) Maxim Integrated Products – 0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs

71M6541D/F/G and 71M6542F/G Data Sheet
CK32
MUX_SYNC
MUX_STATE
CKTEST
RTM
FLAG
RTM DATA0 (32 bits)
RTM DATA1 (32 bits)
RTM DATA2 (32 bits)
RTM DATA3 (32 bits)
S
0 1 30 31
FLAG
0 1 30 31
FLAG
0 1 30 31
FLAG
Figure 10: RTM Timing
0 1 30 31
ADC TIMING
ADC MUX Frame
MUX_DIV Conversions, MUX_DIV=4 is shown
Settle
CK32
MUX_SYNC
MUX STATE S
ADC EXECUTION
CE TIMING
0
CE_EXECUTION
CE_BUSY
XFER_BUSY
RTM TIMING
RTM
150
0
1
2
ADC0
ADC1
450
900
CK COUNT = CE_CYCLES + 1CK for each ADC transfer
3
S
ADC2
1350
ADC3
1800
MAX CK COUNT
INITIATED BY A CE OPCODE AT END OF SUM INTERVAL
140
NOTES:
1. ALL DIMENSIONS ARE 5MHZ CK COUNTS.
2. THE PRECISE FREQUENCY OF CK IS 150*CRYSTAL FREQUENCY = 4.9152MHz.
3. XFER_BUSY OCCURS ONCE EVERY SUM_SAMPS CODE PASSES.
Figure 11: Timing relationship between ADC MUX, CE, and RTM Serial Transfer