DS1035 Datasheet, PDF (24/106 Pages) Dallas Semiconductor – 3-in-1 High.Speed Silicon Delay Line

Architecture
MachXO2 Family Data Sheet
More information on the input gearbox is available in TN1203, Implementing High-Speed Interfaces with MachXO2
Devices.
Output Gearbox
Each PIC on the top edge has a built-in 8:1 output gearbox. Each of these output gearboxes may be programmed
as a 7:1 serializer or as one ODDRX4 (8:1) gearbox or as two ODDRX2 (4:1) gearboxes. Table 2-10 shows the
gearbox signals.
Table 2-10. Output Gearbox Signal List
Name
Q
D[7:0]
Video TX(7:1): D[6:0]
GDDRX4(8:1): D[7:0]
GDDRX2(4:1)(IOL-A): D[3:0]
GDDRX2(4:1)(IOL-C): D[7:4]
SCLK
ECLK [1:0]
RST
I/O Type
Output
Input
Description
High-speed data output
Low-speed data from device core
Input
Input
Input
Slow-speed system clock
High-speed edge clock
Reset
The gearboxes have three stage pipeline registers. The first stage registers sample the low-speed input data on the
low-speed system clock. The second stage registers transfer data from the low-speed clock registers to the high-
speed clock registers. The third stage pipeline registers controlled by high-speed edge clock shift and mux the
high-speed data out to the sysIO buffer. Figure 2-17 shows the output gearbox block diagram.
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