Datasheet

71M6515H
Energy Meter IC
DATA SHEET
JULY 2011
Page: 19 of 60 © 2005−2011 Teridian Semiconductor Corporation 1.6
A Maxim Integrated Products Brand
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:
6.2520
12 +⋅
=
PULSEWIDTH
P
W
The PULSE3 and PULSE4 output pins will always generate pulses with 50% duty cycle.
Figure 8: Pulse Generator Timing
Accumulation 1
Accumulation 2 Accumulation 3
Post 1
Post 0
Post 2
READY
APULSE write
CE Operations
Post Processing
Pulse -1
Pulse 0 Pulse 1Pulse Generator
READY
READY
XFER XFER XFER
Accumulation Interval
Post-Processed Data
APULSE write
APULSE write
Accumulation 1
Accumulation 2 Accumulation 3
Post 1
Post 0
Post 2
READY
CE Operations
Post Processing
Pulse 0
Pulse 1 Pulse 2Pulse Generator
READY
READY
XFER XFER XFER
Accumulation Interval
Internal Data (Directly by CE)
Accumulation 1
Accumulation 2 Accumulation 3
Post 1
Post 0
Post 2
Host 0
READY
CE Operations
Post Processing
Host Processing
Pulse -2
Pulse -1 Pulse 0Pulse Generator
Host 1
READY
Host 2
READY
XFER XFER XFER
Accumulation Interval
External (Host data is transferred to the pulse generator in the first accumulation interval after the
next READY)
APULSE write APULSE write
APULSE write