Renesas Single-Chip Microcomputer M37531T-ADS Technical Information PDF herunterladen (Seite 34)

MESC TECHNICAL NEWS

No.M16C-19-9903

( 2 / 2 )

GRADE

M16C/60, M16C/61, M16C/62 Group

Precautions for Setting Pull-up Resistors

1. Related devices

M16C/60 group, M16C/61 group, M16C/62 group

2. Precautions

Ports P0 to P10 can be set to apply a pull-up resistor by using the pull-up control registers.

(1) M16C/60 Group, M16C/61 Group

In Memory expansion mode or Microprocessor mode, the settings of pull-up control regis-

ters for ports P0 to P5 are invalid.

In Memory expansion mode or Microprocessor mode, ports P0, P1, P31 to P37 and P4 can

be used as input ports, but internal pull-up resistors can not be connected.

(2) M16C/62 Group

In Memory expansion mode or Microprocessor mode, the settings of pull-up control regis-

ters for P0 to P3, P40 to P43 and P5 are invalid.

In Memory expansion mode or Microprocessor mode, ports P0, P1, P31 to P37 and P40 to

P43 can be used as input ports, but internal pull-up resistors can not be connected.

(In Memory expansion mode or Microprocessor mode, P44 to P47 can be used as general

input ports, and pull-up control register can be used to connect the internal pull-up resis-

tors.)

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Renesas Single-Chip Microcomputer M37531T-ADS Technical Information Seite 34