FIDO1100 Innovasic Semiconductor Inc., FIDO1100 Datasheet - Page 65

• Manufacturer Part Number: FIDO1100
• Description: 32-bit Real-time Communications Controller
• Manufacturer: Innovasic Semiconductor Inc.

Flexible Input Deterministic Output (fido ® )
32-Bit Real-Time Communications Controller
9.1.4 External Bus Timing for 8-Bit/16-Bit Transfer (with RDY_N)
This timing is programmable via the External Bus Chip Select Control Register (see Figure 23).
The output-enable signal (OE_N) goes active (low) 0–3 clocks (TOE) after the chip
select.
The output-enable signal (OE_N) goes inactive (hi) coincident with the chip select. This
is also when the read data is sampled.
The write-enable signal (WE_N) goes active (low) 0–3 clocks (TWEF) after the chip
select.
The write-enable signal (WE_N) goes inactive (hi) 0–3 clocks (TWER) before the end of
the cycle (CSn_N is removed).
The write-cycle timing is controlled by TwWAIT setting (shown as TxWAIT in the
diagram), 1–16 clocks.
The read-cycle timing is controlled by TrWAIT setting (shown as TxWAIT in the
diagram), 1–16 clocks.
The TxWAIT setting determines when first to start sampling the low active RDY_N line
(labeled with an arrow marked ―1‖ in the diagram).
Figure 24. External Bus Timing for 8-Bit/16-Bit Transfer (with RDY_N)
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