Fujitsu MPA3035AT Product Manual - Page 133

Da0, Da1, Da2, Iordy:ddmardy-:dstrobe

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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 5.11 Recommended series termination for Ultra DMA Signal Host Termination Device Termination DIOR-:HDMARDY-:HSTROBE 33 ohm 82 ohm DIOW-:STOP 33 ohm 82 ohm CS0-, CS1- 33 ohm 82 ohm DA0, DA1, DA2 33 ohm 82 ohm DMACK- 33 ohm 82 ohm DD15 through DD0 33 ohm 33 ohm DMARQ 82 ohm 33 ohm INTRQ 82 ohm 33 ohm IORDY:DDMARDY-:DSTROBE 82 ohm 22 ohm 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 5.8. Figure 5.8 Ultra DMA termination with pull-up or pull-down 5 - 72 C141-E034-02EN

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C141-E034-02EN
5 - 72
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 5.11
Recommended series termination for Ultra DMA
Signal
Host Termination
Device Termination
DIOR-:HDMARDY-:HSTROBE
33 ohm
82 ohm
DIOW-:STOP
33 ohm
82 ohm
CS0-, CS1-
33 ohm
82 ohm
DA0, DA1, DA2
33 ohm
82 ohm
DMACK-
33 ohm
82 ohm
DD15 through DD0
33 ohm
33 ohm
DMARQ
82 ohm
33 ohm
INTRQ
82 ohm
33 ohm
IORDY:DDMARDY-:DSTROBE
82 ohm
22 ohm
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 5.8.
Figure 5.8
Ultra DMA termination with pull-up or pull-down