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TMS320C5515
SPRS645F – AUGUST 2010 – REVISED OCTOBER 2013
2.5.17 Ground Terminal Functions
Table 2-22. Ground Terminal Functions
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SIGNAL
NAME
NO.
TYPE (1)
(2)
OTHER (3)
(4)
DESCRIPTION
A13
A14
D7
D11
E9
E11
E12
E13
E14
F9
V SS
F10
GND
Ground pins
G6
G7
H6
J7
J8
J9
K8
K9
K11
K13
Ground for RTC oscillator. When using a 32.768-KHz crystal, this pin is a local
V SSRTC
C9
GND
ground for the crystal and must not be connected to the board ground (See
Figure 5-4 and Figure 5-5 ). When not using RTC and the crystal is not populated on
the board, this pin is connected to the board ground.
see
V SSA_PLL
D9
GND
Section 4.2 ,
Analog PLL ground for the system clock generator.
ROC
see
USB_V SSPLL
G11
GND
Section 4.2 ,
USB Analog PLL ground.
ROC
see
USB_V SS1P3
H13
GND
Section 4.2 ,
Digital core ground for USB phy.
ROC
see
USB_V SSA1P3
H9
GND
Section 4.2 ,
Analog ground for USB PHY [For high speed sensitive analog circuits].
ROC
see
USB_V SSA3P3
H11
GND
Section 4.2 ,
Analog ground for USB PHY.
ROC
see
USB_V SSOSC
F11
S
Section 4.2 ,
Ground for USB oscillator.
ROC
(1)
(2)
(3)
(4)
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal, BH = Bus Holder
Input pins of type I, I/O, and I/O/Z are required to be driven at all times. To achieve the lowest power, these pins must not be allowed to
float. When they are configured as input or high-impedance state, and not driven to a known state, they may cause an excessive IO-
supply current. Prevent this current by externally terminating it or enabling IPD/IPU, if applicable.
IPD = Internal pulldown, IPU = Internal pullup. For more detailed information on pullup/pulldown resistors and situations where external
pullup/pulldown resistors are required, see Section 3.8.1 , Pullup/Pulldown Resistors .
Specifies the operating I/O supply voltage for each signal
46
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