SMJ320LC549 Datasheet, PDF (9/52 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

SMJ320LC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
SGUS032B – OCTOBER 2002 – REVISED MAY 2003
Signal Descriptions (Continued)
TERMINAL
NAME
TYPE^†
DESCRIPTION
IEEE1149.1 TEST PINS (CONTINUED)
EMU1/OFF
I/O/Z
Emulator interrupt 1 pin/disable all outputs. When TRST is driven high, EMU1/OFF is used as an interrupt to or
from the emulator system and is defined as input/output by way of IEEE standard 1149.1 scan system. When
TRST is driven low, EMU1/OFF is configured as OFF. The EMU1/OFF signal, when active low, puts all output
drivers into the high-impedance state. Note that OFF is used exclusively for testing and emulation purposes (not
for multiprocessing applications). Therefore, for the OFF condition, the following conditions apply:
TRST = low,
EMU0 = high
EMU1/OFF = low
DEVICE TEST PIN
TEST1
I
Test1 – Reserved for internal use only. This pin must not be connected (NC).
† _{I = Input, O = Output, Z = High impedance}
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