TMS320C6421 datasheet(54/59 Pages) TI

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5.3 Electrical Characteristics Over Recommended Ranges of Supply Voltage and Operating

TMS320C6421

Fixed-Point Digital Signal Processor

SPRS346A – JANUARY 2007 – REVISED MARCH 2007

Temperature (Unless Otherwise Noted)

PARAMETER

TEST CONDITIONS (1)

MIN

TYP

MAX

UNIT

High-level output voltage (3.3V I/O except

VOH

DVDD33 = MIN, IOH = MAX

2.4

I2C pins)

Low-level output voltage (3.3V I/O except

DVDD33 = MIN, IOL = MAX

0.4

I2C pins)

VOL

Low-level output voltage (3.3V I/O I2C pins) IO = 3 mA

0.4

VI = VSS to DVDD33 without internal

±10

µA

resistor

Input current [DC] (except I2C capable

VI = VSS to DVDD33 with internal pullup

100

250

µA

pins)

resistor (3)

II(2)

VI = VSS to DVDD33 with opposing

–250

–100

–50

µA

internal pulldown resistor (3)

Input current [DC] (I2C)

VI = VSS to DVDD33

±10

µA

CLK_OUT0/PWM2/GPIO[84] and

VLYNQ_CLOCK/GP[57]

IOH

High-level output current [DC]

DDR2

–13.4

All other peripherals

CLK_OUT0/PWM2/GPIO[84] and

VLYNQ_CLOCK/GP[57]

IOL

Low-level output current [DC]

DDR2

13.4

All other peripherals

VO = DVDD33 or VSS; internal pull

±20

µA

disabled

IOZ(4)

I/O Off-state output current

VO = DVDD33 or VSS; internal pull

±100

µA

enabled

CVDD = 1.2 V, DSP clock = 600 MHz

TBD

CVDD = 1.2 V, DSP clock = 500 MHz

TBD

ICDD

Core (CVDD, VDDA_1P1V) supply current(5)

CVDD = 1.2 V, DSP clock = 400 MHz

TBD

CVDD = 1.05 V, DSP clock = 400 MHz

TBD

DVDD = 3.3 V, DSP clock = 600 MHz

TBD

IDDD

3.3V I/O (DVDD33) supply current(5)

DVDD = 3.3 V, DSP clock = 500 MHz

TBD

DVDD = 3.3 V, DSP clock = 400 MHz

TBD

DVDD = 1.8 V, DSP clock = 600 MHz

TBD

1.8V I/O (DVDDR2, DDR_VDDDLL,

IDDD

PLLVPRW18, VDDA_1P8V, MXVDD) supply

DVDD = 1.8 V, DSP clock = 500 MHz

TBD

current(5)

DVDD = 1.8 V, DSP clock = 400 MHz

TBD

Input capacitance

Output capacitance

(1)

For test conditions shown as MIN, MAX, or NOM, use the appropriate value specified in the recommended operating conditions table.

(2)

II applies to input-only pins and bi-directional pins. For input-only pins, II indicates the input leakage current. For bi-directional pins, II

indicates the input leakage current and off-state (Hi-Z) output leakage current.

(3)

Applies only to pins with an internal pullup (IPU) or pulldown (IPD) resistor.

(4)

IOZ applies to output-only pins, indicating off-state (Hi-Z) output leakage current.

(5)

Measured under the following conditions: 60% DSP CPU utilization; DDR2 Memory Controller at 50% utilization (135 MHz), 50% writes,

32 bits, 50% bit switching; 2-MHz McBSP at 100% utilization; Timer0 at 100% utilization. At room temperature (25 °C) for typical

process devices. The actual current draw varies across manufacturing processes and is highly application-dependent. For more details

on core and I/O activity, as well as information relevant to board power supply design, see the TMS320C642x Power Consumption

Summary Application Report (literature number TBD).

Device Operating Conditions

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