71M6511-IGT TERIDIAN [Teridian Semiconductor Corporation], 71M6511-IGT Datasheet - Page 48

• Manufacturer Part Number: 71M6511-IGT
• Description: Single-Phase Energy Meter IC
• Manufacturer: TERIDIAN [Teridian Semiconductor Corporation]

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.
Page: 48 of 95
TMUXOUT/RTM
RTM DATA0 (32 bits)
RTM DATA1 (32 bits)
RTM DATA2 (32 bits)
RTM DATA3 (32 bits)
MUX_SYNC
SSDATA (Output)
CKTEST
SCLK (Output)
SFR (Output)
SRDY (Input)
MUX_SYNC
CK32
SSDATA (Output)
FLAG
SCLK (Output)
SFR (Output)
SRDY (Input)
Figure 16: SSI Timing, 16-bit Field Example (External Device Delays SRDY)
0
If SSI_CKGATE =1
1
30
Figure 15: SSI Timing, (SSI_FPOL = SSI_RDYPOL = 0)
31
31
© 2005-2007 TERIDIAN Semiconductor Corporation
FLAG
30
Figure 14: RTM Output Format
SSI_BEG
16
0
15
31
1
If 16bit fields
30
30
1
31
29
0
31
FLAG
Single-Phase Energy Meter IC
Next field is delayed while SRDY is low
30
18
17
SSI_BEG+1
0
16
71M6511/71M6511H
16
1
15
If 32bit fields
30
DATA SHEET
16
31
1
16
0
FLAG
16
31
15
SSI_END
If SSI_CKGATE =1
14
0
1
1
0
13
30
AUGUST 2007
12
31
V2.6