M054LDN datasheet(21/86 Pages) ETC2

21 / 86 page

M051 DN/DE

Oct. 05, 2015

Page 21 of 86

Rev 1.03

P4.1

PWM1

[2]

T3EX

I/O

purpose I/O port, which can be configured as Input,

Output, Quasi-bidirectional and Open-drain mode.

Port 3 supports multi-function pins, including PWM0 ~

PWM3, nCS, ALE, ICE_CLK, ICE_DAT, SCL1, SDA1,

T2EX and T3EX.

The PWM0 ~ PWM3 pins are for PWM function.

The nCS and ALE pins are for EBI function.

The ICE_CLK and ICE_DAT pins are for Serial Wire

Debug Interface.

The SDA1 and SCL1 pins are for I

2C1 function and both

of them are open-drain.

The T2EX and T3EX pins are for external capture/reset

trigger input of Timer2/3.

P4.2

PWM2

[2]

I/O

P4.3

PWM3

[2]

I/O

P4.4

nCS

SCL1

I/O

P4.5

ALE

SDA1

I/O

P4.6

ICE_CLK

I/O

P4.7

ICE_DAT

I/O

Note 1: I/O type description. I: Input, O: Output, I/O: Quasi-bidirectional, D: Open-drain, P: Power pins, ST: Schmitt trigger.

Note 2: The PWM0 ~ PWM3, RXD, TXD, RXD1, TXD1, SCL1, SDA1 and CKO can be assigned to different pins. However,

a pin function can only be assigned to a pin at the same time, i.e. software cannot assign RXD to P0.3 and P3.0 at the same

time.

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