71M6511 Datasheet, PDF (48/95 Pages) Teridian Semiconductor Corporation – Single-Phase Energy Meter IC

71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
CK32
MUX_SYNC
CKTEST
TMUXOUT/RTM
FLAG
RTMDATA0 (32 bits)
RTMDATA1 (32 bits)
RTMDATA2 (32 bits)
RTMDATA3 (32 bits)
0 1 30 31
FLAG
0 1 30 31
FLAG
0 1 30 31
FLAG
0 1 30 31
Figure 14: RTM Output Format
SFR (Output)
SRDY (Input)
SCLK (Output)
SSDATA (Output)
MUX_SYNC
If SSI_CKGATE =1
If 16bit fields
If 32bit fields
If SSI_CKGATE =1
31 30
16 15
SSI_BEG
1 0 31 30
16 15
SSI_BEG+1
1 0 31
10
SSI_END
Figure 15: SSI Timing, (SSI_FPOL = SSI_RDYPOL = 0)
SFR (Output)
SRDY (Input)
SCLK (Output)
SSDATA (Output)
Next field is delayed while SRDY is low
31 30 29
18 17 16 16 16 16 15 14 13 12
Figure 16: SSI Timing, 16-bit Field Example (External Device Delays SRDY)
SFR is the framing pulse. Although CE words are always 32 bits, the SSI interface will frame the entire data block as a single
field, as multiple 16-bit fields, or as multiple 32-bit fields. The SFR pulse is one SCLK clock cycle wide, changes state on the
rising edge of SCLK and precedes the first bit of each field.
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