TNETV6446AINZWT datasheet(166/227 Pages) TI1

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PCLK

TMS320DM6446

SPRS283H – DECEMBER 2005 – REVISED SEPTEMBER 2010

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6.13.1.6 VPFE Electrical Data/Timing

Table 6-53. Timing Requirements for VPFE PCLK Master/Slave Mode (see Figure 6-46)

A-513,

-594,

NO.

UNIT

-810

MIN

MAX

(A-513 and -594 devices)

10.204 or 13.33(1)

tc(PCLK)

Cycle time, PCLK

(-810 devices)

9.25 or 13.33(1)

tw(PCLKH)

Pulse duration, PCLK high

4.4

tw(PCLKL)

Pulse duration, PCLK low

4.4

tt(PCLK)

Transition time, PCLK

(1)

When PCLK sources the clock for both the VPFE and VPBE, the minimum cycle time of 13.33 ns (specified in Table 6-60, Timing

Requirements for VPBE CLK Inputs for VPBE) must be met. When PCLK sources the clock for only the VPFE, a minimum cycle time of

10.2 ns may be used for A-513 and -594 devices and a minimum cycle time of 9.25 ns may be used for -810 devices.

Figure 6-46. VPFE PCLK Timing

Table 6-54. Timing Requirements for VPFE (CCD) Slave Mode(1) (see Figure 6-47)

A-513,

-594,

NO.

UNIT

-810

MIN

MAX

tsu(CCDV-PCLK)

Setup time, CCD valid before PCLK edge

th(PCLK-CCDV)

Hold time, CCD valid after PCLK edge

tsu(HDV-PCLK)

Setup time, HD valid before PCLK edge

th(PCLK-HDV)

Hold time, HD valid after PCLK edge

tsu(VDV-PCLK)

Setup time, VD valid before PCLK edge

th(PCLK-VDV)

Hold time, VD valid after PCLK edge

tsu(C_WEV-PCLK)

Setup time, C_WE valid before PCLK edge

th(PCLK-C_WEV)

Hold time, C_WE valid after PCLK edge

tsu(C_FIELDV-PCLK)

Setup time, C_FIELD valid before PCLK edge

th(PCLK-C_FIELDV)

Hold time, C_FIELD valid after PCLK edge

(1)

The VPFE may be configured to operate in either positive or negative edge clocking mode. When in positive edge clocking mode the

rising edge of PCLK is referenced. When in negative edge clocking mode the falling edge of PCLK is referenced.

166

Peripheral and Electrical Specifications

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