AMPL138ZCE3 datasheet(29/268 Pages) TI

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3.9 Terminal Functions

3.9.1

Device Reset, NMI and JTAG

OMAP-L138 Low-Power Applications Processor

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SPRS586A – JUNE 2009 – REVISED AUGUST 2009

Table 3-4 to Table 3-29 identify the external signal names, the associated pin/ball numbers along with the

mechanical package designator, the pin type (I, O, IO, OZ, or PWR), whether the pin/ball has any internal

pullup/pulldown resistors, whether the pin/ball is configurable as an IO in GPIO mode, and a functional pin

description.

Table 3-4. Reset, NMI and JTAG Terminal Functions

SIGNAL

POWER

TYPE(1)

PULL(2)

DESCRIPTION

GROUP(3)

NAME

NO.

RESET

K14

IPU

Device reset input

NMI

J17

IPU

Non-Maskable Interrupt

RESETOUT / UHPI_HAS/ PRU1_R30[14] /

T17

O(4)

IPD

Reset output

GP6[15]

JTAG

TMS

L16

IPU

JTAG test mode select

TDI

M16

IPU

JTAG test data input

TDO

J18

IPU

JTAG test data output

TCK

J15

IPU

JTAG test clock

TRST

L17

IPD

JTAG test reset

EMU[0]

J16

I/O

IPU

Emulation pin

EMU[1]

K16

I/O

IPU

Emulation pin

RTCK/ GP8[0]

K17

I/O

IPD

JTAG Test Clock Return Clock Output

(1)

I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal.

Note: For multiplexed pins where functions have different types (ie., input versus output), the table reflects the pin function direction for

that particular peripheral.

(2)

IPD = Internal Pulldown resistor, IPU = Internal Pullup resistor

(3)

This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can

be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of

power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power

supply DVDD3318_C.

(4)

Open drain mode for RESETOUT function.

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