Datasheet

Rev. F | Page 38 of 64 | March 2008
ADSP-21060/ADSP-21060L/ADSP-21062/ADSP-21062L/ADSP-21060C/ADSP-21060LC
Link Ports —1 × CLK Speed Operation
Table 23. Link Ports—Receive
5 V 3.3 V
Unit
Parameter Min Max Min Max
Timing Requirements
t
SLDCL
Data Setup Before LCLK Low
1
3.5 3 ns
t
HLDCL
Data Hold After LCLK Low 3 3 ns
t
LCLKIW
LCLK Period (1u Operation) t
CK
t
CK
ns
t
LCLKRWL
LCLK Width Low 6 6 ns
t
LCLKRWH
LCLK Width High 55ns
Switching Characteristics
t
DLAHC
LACK High Delay After CLKIN High
2, 3
18 + DT/2 28.5 + DT/2 18 + DT/2 28.5 + DT/2 ns
t
DLALC
LACK Low Delay After LCLK High –3 +13 –3 +13 ns
t
ENDLK
LACK Enable From CLKIN 5 + DT/2 5 + DT/2 ns
t
TDLK
LACK Disable From CLKIN 20 + DT/2 20 + DT/2 ns
1
For ADSP-21062, specification is 3 ns min.
2
LACK goes low with t
DLALC
relative to rise of LCLK after first nibble, but does not go low if the receiver’s link buffer is not about to fill.
3
For ADSP-21060C, specification is 18 + DT/2 ns min, 29 + DT/2 ns max.
Table 24. Link Ports—Transmit
5 V 3.3 V
Unit
Parameter Min Max Min Max
Timing Requirements
t
SLACH
LACK Setup Before LCLK High
1
18 18 ns
t
HLACH
LACK Hold After LCLK High –7 –7 ns
Switching Characteristics
t
DLCLK
Data Delay After CLKIN (1u
Operation)
2
15.5 15.5 ns
t
DLDCH
Data Delay After LCLK High
3
32.5ns
t
HLDCH
Data Hold After LCLK High –3 –3 ns
t
LCLKTWL
LCLK Width Low
4
(t
CK
/2) – 2 (t
CK
/2) + 2 (t
CK
/2) – 1 (t
CK
/2) + 1.25 ns
t
LCLKTWH
LCLK Width High
5
(t
CK
/2) – 2 (t
CK
/2) + 2 (t
CK
/2) – 1.25 (t
CK
/2) + 1 ns
t
DLACLK
LCLK Low Delay After LACK High
6
(t
CK
/2) + 8.5 (3 u t
CK
/2) + 17 (t
CK
/2) + 8 (3 u t
CK
/2) + 17.5 ns
t
ENDLK
LACK Enable From CLKIN 5 + DT/2 5 + DT/2 ns
t
TDLK
LACK Disable From CLKIN 20 + DT/2 20 + DT/2 ns
1
For ADSP-21060L/ADSP-21060LC, specification is 20 ns min.
2
For ADSP-21060L, specification is 16.5 ns max; for ADSP-21060LC, specification is 16.75 ns max.
3
For ADSP-21062, specification is 2.5 ns max.
4
For ADSP-21062, specification is (t
CK
/2) – 1 ns min, (t
CK
/2) + 1.25 ns max; for ADSP-21062L, specification is (t
CK
/2) – 1 ns min, (t
CK
/2) + 1.5 ns max; for ADSP-21060LC
specification is (t
CK
/2) – 1 ns min, (t
CK
/2) + 2.25 ns max.
5
For ADSP-21062, specification is (t
CK
/2) – 1.25 ns min, (t
CK
/2) + 1 ns max; for ADSP-21062L, specification is (t
CK
/2) – 1.5 ns min, (t
CK
/2) + 1 ns max; for ADSP-21060C
specification is (t
CK
/2) – 2.25 ns min, (t
CK
/2) + 1 ns max.
6
For ADSP-21062, specification is (t
CK
/2) + 8.75 ns min, (3 × t
CK
/2) + 17 ns max; for ADSP-21062L, specification is (t
CK
/2) + 8 ns min, (3 × t
CK
/2) + 17 ns max; for
ADSP-21060LC specification is (t
CK
/2) + 8 ns min, (3 × t
CK
/2) + 18.5 ns max.