Texas Instruments SM320C6455-EP manual Signal TYPE1 Name no, Supply Voltage Pins

SM320C6455-EP

FIXED-POINT DIGITAL SIGNAL PROCESSOR

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SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

Table 2-3. Terminal Functions (continued)

SIGNAL

TYPE(1)

NAME NO.

CVDDMONN1

DVDD33MONL6

DVDD15MON F3 I

DVDD18MONA26

VREFSSTL C14 A

VREFHSTL	B2	A
DVDDR	AD20	S
	AC15
AVDDA	AC17	A
	AD16
AVDLL1	A13	A
AVDLL2	E18

IPD/IPU(2) DESCRIPTION

SUPPLY VOLTAGE MONITOR PINS

Die-side 1.2-V core supply (CVDD) voltage monitor pin. The monitor pins indicate the voltage on the die and, therefore, provide the best probe point for voltage monitoring purposes. For more information regarding the use of this and other voltage monitoring pins, see the TMS320C6455 Design Guide and Comparisons to TMS320TC6416T application report (literature number

SPRAA89). If the CVDDMON pin is not used, it should be connected directly to the 1.2-V core supply (CVDD).

Die-side 3.3-V I/O supply (DVDD33) voltage monitor pin. The monitor pins indicate the voltage on the die and, therefore, provide the best probe point for

voltage monitoring purposes. For more information regarding the use of this and other voltage monitoring pins, see the TMS320C6455 Design Guide and Comparisons to TMS320TC6416T application report (literature number

SPRAA89). If the DVDD33MON pin is not used, it should be connected directly to the 3.3-V I/O supply (DVDD33).

Die-side 1.5-/1.8-V I/O supply (DVDD15) voltage monitor pin. The monitor pins indicate the voltage on the die and, therefore, provide the best probe point for

voltage monitoring purposes. For more information regarding the use of this and other voltage monitoring pins, see the TMS320C6455 Design Guide and Comparisons to TMS320TC6416T application report (literature number

SPRAA89). If the DVDD15MON pin is not used, it should be connected directly to the 1.5-/1.8-V I/O supply (DVDD15).

NOTE: If the RGMII mode of the EMAC is not used, the DVDD15, DVDD15MON, VREFHSTL, RSV13, and RSV14 pins can be connected directly to ground (VSS) to save power. However, connecting these pins directly to ground prevents

boundary-scan from functioning on the RGMII pins of the EMAC. To preserve boundary-scan functionality on the RGMII pins, see Section 7.3.4.

Die-side 1.8-V I/O supply (DVDD18) voltage monitor pin. The monitor pins indicate the voltage on the die and, therefore, provide the best probe point for

voltage monitoring purposes. For more information regarding the use of this and other voltage monitoring pins, see the TMS320C6455 Design Guide and Comparisons to TMS320TC6416T application report (literature number

SPRAA89). If the DVDD18MON pin is not used, it should be connected directly to the 1.8-V I/O supply (DVDD18).

SUPPLY VOLTAGE PINS

(DVDD18/2)-V reference for SSTL buffer (DDR2 Memory Controller). This input voltage can be generated directly from DVDD18 using two 1-kΩresistors to form a resistor divider circuit.

NOTE: The DDR2 Memory Controller is not used, the VREFSSTL, RSV11, and RSV12 pins can be connected directly to ground (VSS) to save power. However, connecting these pins directly to ground prevents boundary-scan from functioning on the DDR2 Memory Controller pins. To preserve boundary-scan functionality on the DDR2 Memory Controller pins, see Section 7.3.4.

(DVDD15/2)-V reference for HSTL buffer (EMAC RGMII). VREFHSTL can be generated directly from DVDD15 using two 1-kΩresistors to form a resistor divider circuit.

NOTE: If the RGMII mode of the EMAC is not used, the DVDD15, VREFHSTL, RSV13, and RSV14 pins can be connected to directly ground (VSS) to save power. However, connecting these pins directly to ground prevents boundary-scan from functioning on the RGMII pins of the EMAC. To preserve boundary-scan functionality on the RGMII pins, see Section 7.3.4.

1.8-V I/O supply voltage (SRIO regulator supply).

NOTE: If Rapid I/O is not used, this pin can be connected directly to VSS.

SRIO analog supply:

1.25-V I/O supply voltage (-1000 and -1200 devices)

1.2-V I/O supply voltage (-850 and -720 devices). Do not use core supply.

NOTE: If Rapid I/O is not used, these pins can be connected directly to VSS.

1.8-V I/O supply voltage.

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