71M6515H Datasheet, PDF (17/57 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6515H
Energy Meter IC
DATA SHEET
MARCH 2008
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
2520.6
+1
The PULSE3 and PULSE4 output pins will always generate pulses with 50% duty cycle.
Internal Data (Directly by CE)
Accumulation Interval
CE Operations
Accumulation 1
XFER
Post Processing
Post 0
READY
Accumulation 2
XFER
Post 1
READY
Accumulation 3
XFER
Post 2
READY
Pulse Generator
Pulse 0
Pulse 1
Pulse 2
Post-Processed Data
CE Operations
Post Processing
Accumulation Interval
Accumulation 1
XFER
Post 0
READY
Pulse Generator
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
Accumulation 1
Accumulation 2
Accumulation 3
XFER
XFER
XFER
Post Processing
Post 0
Post 1
Post 2
READY
READY
READY
Host Processing
Host 0
APULSE write
Host 1
APULSE write
Host 2
APULSE write
Pulse Generator
Pulse -2
Pulse -1
Pulse 0
Figure 9: Pulse Generator Timing
Page: 17 of 57
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