TMS320DM6446_07 Datasheet, PDF (27/231 Pages) Texas Instruments – Digital Media System-on-Chip

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TMS320DM6446
Digital Media System-on-Chip
SPRS283E – DECEMBER 2005 – REVISED MARCH 2007
Table 2-6. Oscillator/PLL Terminal Functions
SIGNAL
TYPE ⁽¹⁾
NAME
NO.
OTHER ⁽²⁾
DESCRIPTION
OSCILLATOR, PLL
MXI/CLKIN
L1
I
DV_DD18
Crystal input MXI for MX oscillator (system oscillator, typically 27 MHz). If a crystal
input is not used, but instead a physical clock-in source is supplied, this is the
external oscillator clock input.
MXO
M1
O
DV_DD18
Crystal output for MX oscillator. If a crystal input is not used, but instead a physical
clock-in source is supplied, MXO should be left as a No Connect.
MXV_DD
L5
S
1.8-V power supply for MX oscillator. If a crystal input is not used, but instead a
(3)
physical clock-in source is supplied, MXV_DD should still be connected to the 1.8-V
power supply.
MXV_SS
M24XI
L2 GND
F18
I
(3)
DV_DD18
Ground for MX oscillator. If a crystal input is not used, but instead a physical
clock-in source is supplied, MXV_SS should still be connected to ground.
Crystal input for M24 oscillator (24 MHz for USB). If a crystal input is not used, but
instead a physical clock-in source is supplied, this is the external oscillator clock
input. When the USB peripheral is not used, M24XI should be left as a No Connect.
M24XO
F19
O
DV_DD18
Crystal output for M24 oscillator. If a crystal input is not used, but instead a physical
clock-in source is supplied, M24XO should be left as a No Connect. When the USB
peripheral is not used, M24XO should be left as a No Connect.
M24V_DD
F16
S
1.8-V power supply for M24 oscillator. If a crystal input is not used, but instead a
(3)
physical clock-in source is supplied, M24V_DD should still be connected to the 1.8-V
power supply. When the USB peripheral is not used, M24V_DD should be connected
to the 1.8-V power supply.
M24V_SS
PLLV_DD18
F17 GND
M2
S
Ground for M24 oscillator. If a crystal input is not used, but instead a physical
(3)
clock-in source is supplied, M24V_SS should still be connected to ground. When the
USB peripheral is not used, M24V_SS should be connected to ground.
(3)
1.8-V power supply for PLLs (system).
(1) I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal
(2) Specifies the operating I/O supply voltage for each signal
(3) For more information, see the Recommended Operating Conditions table
Table 2-7. Clock Generator Terminal Functions
SIGNAL
TYPE ⁽¹⁾
NAME
NO.
OTHER ⁽²⁾
DESCRIPTION
CLOCK GENERATOR
CLK_OUT0/
GPIO48
K1 I/O/Z
DV_DD18
This pin is multiplexed between the PLL1 clock generator and GPIO.
For the PLL1 clock generator, it is clock output CLK_OUT0. This is configurable for
13.5 MHz or 27 MHz clock outputs.
CLK_OUT1/
TIM_IN/
GPIO49
E19 I/O/Z
DV_DD18
This pin is multiplexed between the USB clock generator, timer, and GPIO.
For the USB clock generator, it is clock output CLK_OUT1. This is configurable for
12 MHz or 24 MHz clock outputs.
(1) I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal
(2) Specifies the operating I/O supply voltage for each signal
Table 2-8. RESET and JTAG Terminal Functions
SIGNAL
NAME
NO.
TYPE⁽¹⁾ OTHER^{(2) (3)}
DESCRIPTION
RESET
RESET
L4
I
IPU
DV_DD18
This is the active low global reset input.
JTAG
(1) I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal
(2) IPD = Internal pulldown, IPU = Internal pullup. (To pull up a signal to the opposite supply rail, a 1-kΩ resistor should be used.)
(3) Specifies the operating I/O supply voltage for each signal
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