71M6542F MAXIM [Maxim Integrated Products], 71M6542F Datasheet - Page 26

• Manufacturer Part Number: 71M6542F
• Description: 0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs
• Manufacturer: MAXIM [Maxim Integrated Products]

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