ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢈꢉ ꢈꢀꢊ ꢀꢁ ꢂꢃ ꢄ ꢅ ꢆꢇ ꢈ ꢉ ꢋꢀꢊ ꢀꢁ ꢂꢃ ꢄ ꢅ ꢆꢇ ꢈ ꢉ ꢇ ꢀ
ꢌ ꢍ ꢎꢏ ꢐꢑꢒ ꢓꢍ ꢔ ꢀ ꢐꢍ ꢕ ꢍ ꢀꢖꢗ ꢂ ꢍ ꢕꢔ ꢖꢗ ꢒ ꢘꢓ ꢆꢏ ꢂꢂꢓ ꢘꢂ
SPRS226H − NOVEMBER 2003 − REVISED AUGUST 2005
Terminal Functions
SIGNAL
NAME
IPD/
IPU
†
DESCRIPTION
TYPE
‡
NO.
CLOCK/PLL CONFIGURATION
CLKIN
H4
I
IPD
IPD
Clock Input. This clock is the input to the on-chip PLL.
Clock output at 1/4 of the device speed (O/Z) [default] or this pin can be programmed as a
GPIO 1 pin (I/O/Z).
§
§
CLKOUT4/GP1
AE6
I/O/Z
Clock output at 1/6 of the device speed (O/Z) [default] or this pin can be programmed as a
GPIO 2 pin (I/O/Z).
CLKOUT6/GP2
CLKMODE1
CLKMODE0
AD6
G1
I/O/Z
IPD
IPD
IPD
Clock mode select
I
I
•
Selects whether the CPU clock frequency = input clock frequency x1 (Bypass), x6, or x12,
or x20. For more details on the CLKMODE pins and the PLL multiply factors, see the Clock
PLL section of this data sheet.
H2
J6
¶
#
A
PLLV
PLL voltage supply
JTAG EMULATION
TMS
TDO
TDI
AB16
AE19
AF18
AF16
I
IPU
IPU
IPU
IPU
JTAG test-port mode select
JTAG test-port data out
JTAG test-port data in
JTAG test-port clock
O/Z
I
I
TCK
JTAG test-port reset. For IEEE 1149.1 JTAG compatibility, see the IEEE 1149.1 JTAG
Compatibility Statement section of this data sheet.
TRST
AB15
I
IPD
EMU11
EMU10
EMU9
EMU8
EMU7
EMU6
EMU5
EMU4
EMU3
EMU2
AC18
AD18
AE18
AC17
AF17
AD17
AE17
AC16
AD16
AE16
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
I/O/Z
IPU
IPU
IPU
IPU
IPU
IPU
IPU
IPU
IPU
IPU
Emulation pin 11. Reserved for future use, leave unconnected.
Emulation pin 10. Reserved for future use, leave unconnected.
Emulation pin 9. Reserved for future use, leave unconnected.
Emulation pin 8. Reserved for future use, leave unconnected.
Emulation pin 7. Reserved for future use, leave unconnected.
Emulation pin 6. Reserved for future use, leave unconnected.
Emulation pin 5. Reserved for future use, leave unconnected.
Emulation pin 4. Reserved for future use, leave unconnected.
Emulation pin 3. Reserved for future use, leave unconnected.
Emulation pin 2. Reserved for future use, leave unconnected.
Emulation [1:0] pins
•
Select the device functional mode of operation
EMU[1:0]
Operation
00
01
10
11
Boundary Scan/Normal Mode (see Note)
Reserved
Reserved
Emulation/Normal Mode [default] (see the IEEE 1149.1 JTAG
Compatibility Statement section of this data sheet)
EMU1
EMU0
AC15
AF15
I/O/Z
IPU
Normal mode refers to the DSPs normal operational mode, when the DSP is free running. The
DSP can be placed in normal operational 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 Normal mode.
For the Boundary Scan mode pulldown EMU[1:0] pins with a dedicated 1-kΩ resistor.
†
‡
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground
IPD = Internal pulldown, IPU = Internal pullup. (These IPD/IPU signal pins feature a 30-kΩ IPD or IPU resistor. To pull up a signal to the opposite
supply rail, a 1-kΩ resistor should be used.)
These pins are multiplexed pins. For more details, see the Device Configurations section of this data sheet.
PLLV is not part of external voltage supply. See the Clock PLL section for information on how to connect this pin.
A = Analog signal (PLL Filter)
§
¶
#
42
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
TI [ TEXAS INSTRUMENTS ]
