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| SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005 |
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| Terminal Functions (Continued) |
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| PIN |
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| SIGNAL | NO. | TYPE† | IPD/ |
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| DESCRIPTION |
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| NAME | GDP/ | IPU‡ |
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| ZDP |
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| JTAG EMULATION (CONTINUED) |
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| EMU2 | D3 | I/O/Z | IPU | Emulation pin 2. Reserved for future use, leave unconnected. |
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| For Emulation and normal operation, no external pullup/pulldown resistors are necessary. How- |
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| ever for the Boundary Scan operation, pull down the EMU1 and EMU0 pins with a dedicated |
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| Emulation [1:0] pins. |
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| • Select the device functional mode of operation |
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| EMU[1:0] | Operation |
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| 00 | Boundary Scan/Functional Mode (see Note) |
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| 01 | Reserved |
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| EMU1 | B9 |
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| 10 | Reserved |
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| I/O/Z | IPU | 11 | Emulation/Functional Mode [default] (see the IEEE 1149.1 |
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| EMU0 | D9 |
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| JTAG Compatibility Statement section of this data sheet) |
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| The DSP can be placed in Functional mode when the EMU[1:0] pins are |
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| configured for either Boundary Scan or Emulation. |
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| Note: When the EMU[1:0] pins are configured for Boundary Scan mode, the |
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| internal pulldown (IPD) on the | TRST | signal must not be opposed in order to |
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| operate in Functional mode. |
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| For the Boundary Scan mode drive EMU[1:0] and | RESET | pins low. |
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| RESETS AND INTERRUPTS |
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| Device reset. When using Boundary Scan mode on the device, drive the EMU[1:0] and | RESET |
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| RESET |
| A13 | I | −− | pins low. |
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| This pin does not have an IPU on this device. |
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| Nonmaskable interrupt |
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| NMI | C13 | I | IPD | • |
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| Any noise on the NMI pin may trigger an NMI interrupt; therefore, if the NMI pin is not used, it is |
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| recommended that the NMI pin be grounded versus relying on the IPD. |
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| EXT_INT7 | E3 |
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| EXT_INT6 | D2 |
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| interrupts |
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| I | IPU | • |
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| EXT_INT5 | C1 |
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| • Polarity independently selected via the External Interrupt Polarity Register |
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| EXT_INT4 | C2 |
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| bits (EXTPOL.[3:0]), in addition to the GPIO registers. |
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†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.]
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 | 25 |
