Fujitsu MHM2200AT Manual/User Guide - Page 183
Series termination required for Ultra DMA, Table 5.17
View all Fujitsu MHM2200AT manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 183 highlights
Interface 5.5.6 Series termination required for Ultra DMA Series termination resistors are required at both the host and the device for operation in any of the Ultra DMA Modes. The following table describes recommended values for series termination at the host and the device. Table 5.17 Recommended series termination for Ultra DMA Signal Host Termination Device Termination DIOR-:HDMARDY-:HSTROBE 22 Ω 82 Ω DIOW-:STOP 22 Ω 82 Ω CS0-, CS1- 33 Ω 82 Ω DA0, DA1, DA2 33 Ω 82 Ω DMACK- 22 Ω 82 Ω DD15 through DD0 33 Ω 120 Ω (100 MHz) DMARQ 82 Ω 22 Ω INTRQ 82 Ω 22 Ω IORDY:DDMARDY-:DSTROBE 82 Ω 22 Ω Note: Only those signals requiring termination are listed in this table. If a signal is not listed, series termination is not required for operation in an Ultra DMA Mode. For signals also requiring a pull-up or pull-down resistor at the host see Figure 5.9. Vcc IORDY DMARQ Figure 5.9 Ultra DMA termination with pull-up or pull-down Configuration of cable For the configuration of the cable (common use of primary port and secondary port), DMACK signal should not be used in common. It is not recommended to use DIOR-, DIOW- and IORDY signal in common. 5-106 C141-E104-03EN