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71M6515H
A Maxim Integrated Products Brand
Energy Meter IC
DATA SHEET
JULY 2011
The pin PULSE_INIT determines the logic level applied to the pulse pins on power-up, i.e. with PULSE_INIT low, the pulse
pins will be initialized to low (default = 1).
The pulse width P W is controlled with the PULSEWIDTH register for the PULSER and PULSEW output pins per the following
formula:
P W =
2 ? PULSEWIDTH + 1
2520 . 6
The PULSE3 and PULSE4 output pins will always generate pulses with 50% duty cycle.
Internal Data (Directly by CE)
Accumulation Interval
CE Operations
Post Processing
Pulse Generator
Accumulation 1
XFER
Post 0
READY
Pulse 0
Accumulation 2
XFER
Post 1
READY
Pulse 1
Accumulation 3
XFER
Post 2
READY
Pulse 2
Post-Processed Data
Accumulation Interval
CE Operations
Post Processing
Pulse Generator
Accumulation 1
XFER
Post 0
READY
APULSE write
Pulse -1
Accumulation 2
XFER
Post 1
READY
APULSE write
Pulse 0
Accumulation 3
XFER
Post 2
READY
APULSE write
Pulse 1
External (Host data is transferred to the pulse generator in the first accumulation interval after the
next READY)
Accumulation Interval
CE Operations
Post Processing
Host Processing
Pulse Generator
Accumulation 1
XFER
Post 0
READY
Host 0
APULSE write
Pulse -2
Accumulation 2
XFER
Post 1
READY
Host 1
APULSE write
Pulse -1
Accumulation 3
XFER
Post 2
READY
Host 2
APULSE write
Pulse 0
Figure 8: Pulse Generator Timing
Page: 19 of 60
? 2005 ? 2011 Teridian Semiconductor Corporation
1.6
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