162 www.xilinx.com 7 Series FPGAs SelectIO Resources User Guide
UG471 (v1.10) May 8, 2018
Chapter 3: Advanced SelectIO Logic Resources
3-State Parallel-to-Serial Conversion
In addition to parallel-to-serial conversion of data, an OSERDESE2 module also contains a
parallel-to-serial converter for 3-state control of the IOB. Unlike data conversion, the
3-state converter can only serialize up to four bits of parallel 3-state signals. The 3-state
converter cannot be cascaded.
OSERDESE2 Primitive
The OSERDESE2 primitive is shown in Figure 3-14.
X-Ref Target - Figure 3-14
Figure 3-14: OSERDESE2 Primitive
UG471_c3_14_041712
TCE
CLK
OCE
TBYTEIN
RST
SHIFTIN1
SHIFTIN2
OQ
OFB
TQ
TFB
TBYTEOUT
SHIFTOUT1
SHIFTOUT2
OSERDESE2
Primitive
CLKDIV
D1
D2
D3
D4
D5
D6
D7
D8
T1
T3
T4
T2