DS1035 Datasheet, PDF (22/106 Pages) Dallas Semiconductor – 3-in-1 High.Speed Silicon Delay Line

Architecture
MachXO2 Family Data Sheet
Figure 2-15. MachXO2 Output Register Block Diagram (PIO on the Right Edges)
D0
D/L Q ^Q0
Q
D1
DQ
D Q ^Q1
SCLK
DQSW90
TD
T0
D/L Q
DQ
Output Register Block
TQ
Tristate Register Block
Tri-state Register Block
The tri-state register block registers tri-state control signals from the core of the device before they are passed to
the sysIO buffers. The block contains a register for SDR operation. In SDR, TD input feeds one of the flip-flops that
then feeds the output.
The tri-state register blocks on the right edge contain an additional register for DDR memory operation. In DDR
memory mode, the register TS input is fed into another register that is clocked using the DQSW90 signal. The out-
put of this register is used as a tri-state control.
Input Gearbox
Each PIC on the bottom edge has a built-in 1:8 input gearbox. Each of these input gearboxes may be programmed
as a 1:7 de-serializer or as one IDDRX4 (1:8) gearbox or as two IDDRX2 (1:4) gearboxes. Table 2-9 shows the
gearbox signals.
Table 2-9. Input Gearbox Signal List
D
ALIGNWD
SCLK
ECLK[1:0]
RST
Q[7:0]
Name
I/O Type
Input
Input
Input
Input
Input
Output
Description
High-speed data input after programmable delay in PIO A
input register block
Data alignment signal from device core
Slow-speed system clock
High-speed edge clock
Reset
Low-speed data to device core:
Video RX(1:7): Q[6:0]
GDDRX4(1:8): Q[7:0]
GDDRX2(1:4)(IOL-A): Q4, Q5, Q6, Q7
GDDRX2(1:4)(IOL-C): Q0, Q1, Q2, Q3
2-18