Sim2 M80 Dokumentacja Pobierz pdf (Strona 25)

M80 Hardware Design

M80_HD_V1.0 - 25 -

NETLIGH

T

4

O

Network status

indication

VOHmin=

0.85*VDD_EXT

VOLmax=

0.15*VDD_EXT

If unused, keep these

pins open.

Main UART port

PIN NAME

PIN

NO.

I/O

DESCRIPTION

DC

CHARACTERISTICS

COMMENT

DTR

47

I

Data terminal ready

VILmin=-0.3V

VILmax=

0.25*VDD_EXT

VIHmin=

0.75*VDD_EXT

VIHmax=

VDD_EXT+0.3

VOHmin=

0.85*VDD_EXT

VOLmax=

0.15*VDD_EXT

If only use TXD,

RXD and GND to

communicate,

recommend keeping

other pins open.

RXD

50

I

Receiving data

TXD

49

O

Transmitting data

RTS

51

I

Request to send

CTS

48

O

Clear to send

RI

46

O

Ring indicator

DCD

45

O

Data carrier detection

Debug UART port

PIN NAME

PIN

NO.

I/O

DESCRIPTION

DC

CHARACTERISTICS

COMMENT

DBG_TXD

42

O

UART interface for

debugging only.

VILmin=-0.3V

VILmax=

0.25*VDD_EXT

VIHmin=

0.75*VDD_EXT

VIHmax=

VDD_EXT+0.3

VOHmin=

0.85*VDD_EXT

VOLmax=

0.15*VDD_EXT

If unused, keep these

pins open.

DBG_RXD

43

I

Auxiliary UART port

PIN NAME

PIN

NO.

I/O

DESCRIPTION

DC

CHARACTERISTICS

COMMENT

TXD_AUX

40

O

Transmit data

VILmin=-0.3V

VILmax=0.25*VDD

_EXT

VIHmin=0.75*VDD

_EXT

VIHmax=VDD_EXT

+0.3

VOHmin=0.85*VDD

_EXT

If unused, keep these

pins open.

RXD_AUX

41

I

Receive data

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