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DS90C3202 Two-Wire Serial Interface Register Table (Continued)
Address R/W RESET Bit # Description Default Value
26d/1ah R/W None [7] Reserved 0000_0000
[6:4] LVDS input skew control for RXE channel B,
000 (default) applies to no delay added, ONE buffer
delay per step adjustment towards Thold improvements
[3] Reserved
[2:0] LVDS input skew control for RXE channel C,
000 (default) applies to no delay added, ONE buffer
delay per step adjustment towards Thold improvements
27d/1bh R/W None [7] Reserved 0000_0000
[6:4] LVDS input skew control for RXE channel D,
000 (default) applies to no delay added, ONE buffer
delay per step adjustment
[3] Reserved
[2:0] LVDS input skew control for RXE channel E,
000 (default) applies to no delay added, ONE buffer
delay per step adjustment towards Thold improvements
28d/1ch R/W None [7:3] Reserved 0000_0000
[2] LVTTL output transition time control for CLK
0: Tr/Tf = 1.0ns (default)
1: Tr/Tf = 1.5ns
[1] LVTTL output transition time control for RXE
0: Tr/Tf = 1.5ns (default)
1: Tr/Tf = 2.5ns
[0] LVTTL output transition time control for RXO
0: Tr/Tf = 1.5ns (default)
1: Tr/Tf = 2.5ns
29d/1dh R/W None [7:3] Reserved 0000_0000
[2:1] LVTTL output setup and hold time control
00: balanced setup and hold time (default)
01: setup time is increased from default position by 1UI
& hold time is reduced from default position by 1UI
10: setup time is decreased from default position by 1UI
& hold time is reduced from default position by 1UI
11: setup time is increased from default position by 2UI
& hold time is increased from default position by 2UI
[0] LVTTL output PTO control
1: PTO disabled, all outputs setup time are only
controlled by contents of [2:1]
0: PTO enabled (default)
Group1: CLK to latch Data is re-assigned earlier by
0.5UI respect to the normal centered position if only
PTO option enabled; but PTO option and (Tsetup or
Thold) adjustment can co-exist
Group2: CLK to latch Data stays as the normal
centered position if only PTO option enabled; but PTO
option and (Tsetup or Thold) adjustment can co-exist
DS90C3202
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