Motorola TMS320C6711D User Manual
Page 25
TMS320C6711D
FLOATINGĆPOINT DIGITAL SIGNAL PROCESSOR
SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
25
POST OFFICE BOX 1443
•
HOUSTON, TEXAS 77251−1443
Terminal Functions (Continued)
SIGNAL
PIN
NO.
TYPE†
IPD/
‡
DESCRIPTION
SIGNAL
NAME
GDP/
ZDP
TYPE†
IPD/
IPU‡
DESCRIPTION
JTAG EMULATION (CONTINUED)
EMU2
D3
I/O/Z
IPU
Emulation pin 2. Reserved for future use, leave unconnected.
EMU1
EMU0
B9
D9
I/O/Z
IPU
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-k
Ω
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
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
RESET
A13
I
−−
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.
NMI
C13
I
IPD
Nonmaskable interrupt
•
Edge-driven (rising edge)
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.
EXT_INT7
E3
General-purpose input/output pins (I/O/Z) which also function as external
interrupts
EXT_INT6
D2
I
IPU
General-purpose input/output pins (I/O/Z) which also function as external
interrupts
Edge-driven
EXT_INT5
C1
I
IPU
•
Edge-driven
•
Polarity independently selected via the External Interrupt Polarity Register
EXT_INT4
C2
•
Polarity independently selected via the External Interrupt Polarity Register
bits (EXTPOL.[3:0]), in addition to the GPIO registers.
† 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 k
Ω
and 2.0 k
Ω
, respectively.]