71M6403-IGTR TERIDIAN [Teridian Semiconductor Corporation], 71M6403-IGTR Datasheet - Page 45

• Manufacturer Part Number: 71M6403-IGTR
• Description: Electronic Trip Unit
• Manufacturer: TERIDIAN [Teridian Semiconductor Corporation]

Figure 10, Figure 11, and Figure 12 show the RTM and SSI timing, respectively.
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: 45 of 75
SSDATA (Output)
TMUXOUT/RTM
SCLK (Output)
RTM DATA0 (32 bits)
RTM DATA1 (32 bits)
RTM DATA2 (32 bits)
RTM DATA3 (32 bits)
SFR (Output)
SRDY (Input)
MUX_SYNC
MUX_SYNC
PLLOUT
SSDATA (Output)
CK/4
SCLK (Output)
CK32
SFR (Output)
SRDY (Input)
FLAG
Figure 12: SSI Timing, 16-bit Field Example (External Device Delays SRDY)
If SSI_CKGATE =1
0
1
Figure 11: SSI Timing, (SSI_FPOL = SSI_RDYPOL = 0)
30
31
31
30
FLAG
Figure 10: RTM Output Format
©
SSI_BEG
16
2006 TERIDIAN Semiconductor Corporation
15
31
0
If 16bit fields
1
30
30
1
31
29
0
31
FLAG
Next field is delayed while SRDY is low
30
18
17
SSI_BEG+1
0
16
1
16
15
Electronic Trip Unit
If 32bit fields
30
16
31
1
16
FLAG
0
16
31
15
SSI_END
0
If SSI_CKGATE =1
14
1
1
30
71M6403
0
13
SEPTEMBER 2006
31
12
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