Description
For single and multi-device AP configuration, the board trace length and loading between the supported parallel flash and Cyclone® III device should follow these recommendations in Table 1. These recommendations also apply to AP configuration with multiple bus master.
Table 1: Maximum trace length and loading for AP configuration
Cyclone III AP Pins | Maximum Board Trace Length from Cyclone III device to flash device (inches) | Maximum Board Load (pF) |
DCLK | 6 | 15 |
DATA[15..0] | 6 | 30 |
PADD[23..0] | 6 | 30 |
nRESET | 6 | 30 |
Flash_nCE | 6 | 30 |
nOE | 6 | 30 |
nAVD | 6 | 30 |
nWE | 6 | 30 |
RDY | 6 | 30 |
For multiple bus master interface,refer to Figure 1 for the recommended routing to minimize signal integrity issue.
