TNETA1585

ATM TRAFFIC MANAGEMENT SCHEDULER DEVICE

WITH RECEIVE UTOPIA AND COPROCESSOR INTERFACES

SDNS041A – NOVEMBER 1996 – REVISED JULY 1998

24

POST OFFICE BOX 655303

timing requirements (see Figure 7)

receive-UTOPIA interface

NO.

MIN

MAX

UNIT

1

tsu(RXCLAV)

Setup time, RXCLAV low before RXCLK

↑

10

ns

2

tsu(RXSOC)

Setup time, RXSOC high before RXCLK

↑

10

ns

3†

tsu(RXDATA)

Setup time, RXDATA7–RXDATA0 valid before RXCLK

↑

11

ns

4‡

th(RXCLAV)

Hold time, RXCLAV low after RXCLK

↑

2

ns

5

th(RXSOC)

Hold time, RXSOC high after RXCLK

↑

1

ns

6

th(RXDATA)

Hold time, RXDATA7–RXDATA0 valid after RXCLK

↑

1

ns

† This 11-ns minimum setup time deviates from the 10-ns minimum setup time specified in the UTOPIA level-1 revision1-2.01 specification.

‡ This 2-ns minimum hold time deviates from the 1-ns minimum hold time specified in the UTOPIA level-1 revision1-2.01 specification.

RXDATA7 –

RXDATA0

(input)

RXCLK

(input)

RXSOC

(input)

5

RXCLAV

(input)

Byte 53

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

2

1

3

6

4

Figure 7. Receive-UTOPIA Interface