Texas Instruments SM320C6455-EP manual HPI Electrical Data/Timing, 1000/-1000

Models: SM320C6455-EP

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SM320C6455-EP

FIXED-POINT DIGITAL SIGNAL PROCESSOR

www.ti.com

SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

7.12.3 HPI Electrical Data/Timing

Table 7-55. Timing Requirements for Host-Port Interface Cycles(1)(2) (see Table 7-56through Figure 7-51)

NO.

9tsu(HASL-HSTBL)

10th(HSTBL-HASL)

11tsu(SELV-HASL)

12th(HASL-SELV)

13 tw(HSTBL)

14 tw(HSTBH)

15tsu(SELV-HSTBL)

16th(HSTBL-SELV)

17tsu(HDV-HSTBH)

18th(HSTBH-HDV)

37tsu(HCSL-HSTBL)

38th(HRDYL-HSTBL)

 

-720

 

 

 

-850

 

 

 

A-1000/-1000

UNIT

 

-1200

 

 

 

MIN

MAX

 

Setup time, HAS low before HSTROBE low

5

 

ns

Hold time, HAS low after HSTROBE low

2

 

ns

Setup time, select signals(3) valid before HAS low

5

 

ns

Hold time, select signals(3) valid after HAS low

5

 

ns

Pulse duration, HSTROBE low

15

 

ns

Pulse duration, HSTROBE high between consecutive accesses

2M

 

ns

Setup time, select signals(3) valid before HSTROBE low

5

 

ns

Hold time, select signals(3) valid after HSTROBE low

5

 

ns

Setup time, host data valid before HSTROBE high

5

 

ns

Hold time, host data valid after HSTROBE high

1

 

ns

Setup time, HCS low before HSTROBE low

0

 

ns

Hold time, HSTROBE low after HRDY low. HSTROBE should not be

 

 

 

inactivated until HRDY is active (low); otherwise, HPI writes will not

1.1

 

ns

complete properly.

 

 

 

(1)HSTROBE refers to the following logical operation on HCS, HDS1, and HDS2: [NOT(HDS1 XOR HDS2)] OR HCS.

(2)M = SYSCLK3 period = 6/CPU clock frequency in ns. For example, when running parts at 1000 MHz, use M = 6 ns.

(3)Select signals include: HCNTL[1:0] and HR/W. For HPI16 mode only, select signals also include HHWIL.

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C64x+ Peripheral Information and Electrical Specifications

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Texas Instruments SM320C6455-EP manual HPI Electrical Data/Timing, 1000/-1000