Network Device User Guide

ManualsBrandsMotorola ManualsNetwork RouterMC9S12C-Family

Device User Guide — 9S12C128DGV1/D V01.05

88

Two cases with internal voltage regulator enabled and disabled must be considered:

1. Internal Voltage Regulator disabled

Which is the sum of all output currents on I/O ports associated with VDDX and VDDM.

For R

DSON

is valid:

respectively

2. Internal voltage regulator enabled

I

DDR

is the current shown in Table A-8 and not the overall current flowing into VDDR, which

additionally contains the current flowing into the external loads with output high.

P

INT

I

DD

V

DD

⋅ I

DDPLL

V

DDPLL

⋅ I

DDA

+V

DDA

⋅+=

P

IO

R

DSON

i

∑

I

IO

i

2

⋅=

R

DSON

V

OL

I

OL

------------ for outputs driven low;=

R

DSON

V

DD5

V

OH

–

I

OH

------------------------------------ for outputs driven high;=

P

INT

I

DDR

V

DDR

⋅ I

DDA

V

DDA

⋅+=

P

IO

R

DSON

i

∑

I

IO

i

2

⋅=