TMS320F240
DSP CONTROLLER
SPRS042E – OCTOBER 1996 – REVISED NOVEMBER 2002
Terminal Functions (Continued)
TERMINAL
NAME
NO.
TYPE†
DESCRIPTION
TEST SIGNALS (CONTINUED)
TRST
32
I
JTAG test reset with internal pulldown. TRST, when driven high, gives the scan system control of the
operations of the device. If this signal is not connected or driven low, the device operates in its function-
al mode, and the test reset signals are ignored.
Emulator pin 0. When TRST is driven low, EMU0 must be high for activation of the /OFF condition.
When TRST is driven high, EMU0 is used as an interrupt to or from the emulator system and is defined
as input/output through the scan.
Emulator pin 1/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 through JTAG scan. When TRST is driven
low, this pin is configured as OFF. When EMU1/OFF is active low, it puts all output drivers in the
high-impedance state. OFF is used exclusively for testing and emulation purposes (not for
multiprocessing applications); therefore, for OFF condition, the following conditions apply:
TRST = low, EMU0 = high, EMU1/OFF = low
EMU0
38
I/O/Z
EMU1/OFF
39
I/O/Z
RESERVED
42
I
Reserved for test. This pin has an internal pulldown and must be left unconnected.
† I = input, O = output, Z = high impedance
10
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