Equation [2]
SiI 141B
R
>
I
VCC
OHDMIN
or
R
>
VIH
I OHDMIN
SiI-DS-0037-C
Example :
When ST(pin# 79) = 1,Vcc = 3.3V
R > 660Ω = Vcc (or VIH of external chip) / Min IOHD = 3.3V / 5.0mA
The resistor value should be larger than 660ohms
When ST(pin# 79) = 0,Vcc = 3.3V
R > 1,320Ω = Vcc (or VIH of external chip) / Min IOHD = 3.3V / 2.5mA
The resistor value should be larger than 1,320ohms.
These examples assume Vcc (or VIH) of 3.3V, with a lower VIH, the minimum pull down resistor value may be
smaller.
Silicon Image, Inc.
10
Subject to Change without Notice