Texas Instruments TMS320C6711D User Manual page 25

PIN
NO.
SIGNAL SIGNAL
TYPE † TYPE †
NAME
GDP/
ZDP
EMU2 D3 I/O/Z
EMU1 B9
I/O/Z
EMU0 D9
RESET A13 I
NMI C13 I
EXT_INT7 E3
EXT_INT6 D2
I I
EXT_INT5 C1
EXT_INT4 C2
† I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal (PLL Filter)
‡ IPD = Internal pulldown, IPU = Internal pullup. [To oppose the supply rail on these IPD/IPU signal pins, use external pullup or pulldown resistors
no greater than 4.4 kΩ and 2.0 kΩ, respectively.]
FLOATING POINT DIGITAL SIGNAL PROCESSOR
Terminal Functions (Continued)
IPD/ IPD/
IPU ‡ ‡
JTAG EMULATION (CONTINUED)
IPU Emulation pin 2. Reserved for future use, leave unconnected.
For Emulation and normal operation, no external pullup/pulldown resistors are necessary. How-
ever for the Boundary Scan operation, pull down the EMU1 and EMU0 pins with a dedicated
1-kΩ resistor.
Emulation [1:0] pins.
• Select the device functional mode of operation
EMU[1:0] Operation
00 Boundary Scan/Functional Mode (see Note)
01 Reserved
10 Reserved
IPU 11 Emulation/Functional Mode [default] (see the IEEE 1149.1
JTAG Compatibility Statement section of this data sheet)
The DSP can be placed in Functional mode when the EMU[1:0] pins are
configured for either Boundary Scan or Emulation.
Note: When the EMU[1:0] pins are configured for Boundary Scan mode, the
internal pulldown (IPD) on the TRST signal must not be opposed in order to
operate in Functional mode.
For the Boundary Scan mode drive EMU[1:0] and RESET pins low.
RESETS AND INTERRUPTS
Device reset. When using Boundary Scan mode on the device, drive the EMU[1:0] and RESET
−− pins low.
This pin does not have an IPU on this device.
Nonmaskable interrupt
• Edge-driven (rising edge)
IPD
Any noise on the NMI pin may trigger an NMI interrupt; therefore, if the NMI pin is not used, it is
recommended that the NMI pin be grounded versus relying on the IPD.
General-purpose input/output pins (I/O/Z) which also function as external General-purpose input/output pins (I/O/Z) which also function as external
interrupts interrupts
• Edge-driven
Edge-driven
IPU IPU
• Polarity independently selected via the External Interrupt Polarity Register • Polarity independently selected via the External Interrupt Polarity Register
bits (EXTPOL.[3:0]), in addition to the GPIO registers.
•
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
TMS320C6711D
SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
DESCRIPTION DESCRIPTION
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