EM357-RTR datasheet(12/240 Pages) ETC2

12 / 240 page

EM351 / EM357

1-8

120-035X-000D

Preliminary

Pin #

Signal

Direction

Description

JTMS

JTAG mode select from debugger

Selected when in JTAG mode (default mode)

JTAG mode is enabled after power-up or by forcing nRESET low

Select Serial Wire mode using the ARM-defined protocol through a

debugger

Internal pull-up is enabled

SWDIO

I/O

Serial Wire bidirectional data to/from debugger

Enable Serial Wire mode (see JTMS description)

Select Serial Wire mode using the ARM-defined protocol through a

debugger

Internal pull-up is enabled

PB0

I/O

Digital I/O

VREF

Analog O

ADC reference output

Enable analog function with GPIO_PBCFGL[3:0]

VREF

Analog I

ADC reference input

Enable analog function with GPIO_PBCFGL[3:0]

Enable reference output with an Ember system function

IRQA

External interrupt source A

TRACECLK

(see also Pin 25)

Synchronous CPU trace clock

Enable trace interface in ARM core

Select alternate output function with GPIO_PBCFGL[3:0]

TIM1CLK

Timer 1 external clock input

TIM2MSK

Timer 2 external clock mask input

VDD_PADS

Power

Pads supply (2.1-3.6 V)

PC1

I/O

Digital I/O

ADC3

Analog

ADC Input 3

Enable analog function with GPIO_PCCFGL[7:4]

SWO

(see also Pin 33)

Serial Wire Output asynchronous trace output to debugger

Select asynchronous trace interface in ARM core

Enable trace interface in ARM core

Select alternate output function with GPIO_PCCFGL[7:4]

TRACEDATA0

Synchronous CPU trace data bit 0

Select 1-, 2- or 4-wire synchronous trace interface in ARM core

Enable trace interface in ARM core

Select alternate output function with GPIO_PCCFGL[7:4]

VDD_MEM

Power

1.8 V supply (flash, RAM)

PC0

I/O

High

current

Digital I/O

Either enable with GPIO_DBGCFG[5],

or enable Serial Wire mode (see JTMS description, Pin 35) and disable

TRACEDATA1

JRST

JTAG reset input from debugger

Selected when in JTAG mode (default mode, see JTMS description) and

TRACEDATA1 is disabled

Internal pull-up is enabled

IRQD1

Default external interrupt source D

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