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10.3.3 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 10.3-2 Signal treatment
SIGNAL Driven by TYPE By host By drive
- RESET host TP 10k PU
DD 0:15 bi-direction TS
DMAR
Q
drive TS 5.6 k Ω PD
- DIOR host TS
-DMARDY
HSTROBE
- DIOW host TS
STOP
IORDY drive TS 1.0 k Ω PU
-DDMARDY
DSTROBE
CSEL host GND 10 k Ω PU
- DMACK host TP
INTR
Q
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 -CBLID 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