11.3.3 Signal Treatment

Driver types and requirements for the signal pull- up and down are as follows. Resistor requirement is minimum for the host. - IO16 is pulled up in the drive with certain value so that the Vol is obtained to run with a host that has large value of pull up resistor. - CS0 and - CS1 are also pulled up for better noise immunity.

Table 11.3-2 Signal treatment

SIGNAL

Driven by

TYPE

By host

By drive

- RESET

host

TP

 

10kΩPU

DD 0:15

bi-direction

TS

 

 

DMARQ

drive

TS

5.6 k Ω PD

 

- DIOR

host

TS

 

 

-DMARDY

 

 

 

 

HSTROBE

 

 

 

 

- DIOW

host

TS

 

 

STOP

 

 

 

 

IORDY

drive

TS

4.7 k Ω PU

 

-DDMARDY

 

 

 

 

DSTROBE

 

 

 

 

CSEL

host

 

GND

10 k Ω PU

- DMACK

host

TP

 

 

INTRQ

drive

TS

10 k Ω PD

 

- IOCS16

drive

OD

1.0 k Ω PU

1.2 k Ω PU

DA 0:2

host

TP

 

 

- PDIAG／

drive

TS

 

10 k Ω PU

- CS0 - CS1

host

TP

 

 

- DASP

drive

OD

 

10 k Ω PU

TP = Totem Pole, TS = Tri-State, PD = Pull Down, PU = Pull-Up, OD = Open Drain

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