Philips Semiconductors

Product specification

SCN26562

Dual universal serial communications controller (DUSCC)

1995 May 1

8

AC ELECTRICAL CHARACTERISTICS (Continued)

A6–A1

tADVWRL

CEN

tCEHCEL

tCELWRL

WRN

tWRHCEH

tWRLADI

tWRLWRH

tWRHWRL

D0–D7

tWDVWRH

tWRHWDI

RDYN

tWRLRYL

1

NOTES:

1.

Wait on Tx. Transmitter FIFO full.

2.

Timing is illustrated and referenced to the WRN and RDN inputs. The device may also be operated with CEN as the ‘strobing’ input. CEN and RDN

(also CEN and WRN) are ANDed internally. As a consequence, the signal asserted last initiates the cycle and the signal negated first terminates the

cycle.

SD00207

Figure 5. Write Cycle

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

SCN26562C4

SCN26562C2

UNIT

Min

Max

Min

Max

Address valid to WRN low

CEN low to WRN low

WRN low to READY low

WRN high to CEN high

WRN low to WRN high

Write data valid to WRN high

CEN high to CEN low

WRN low to address invalid

WRN high to WRN low

WRN high to write data invalid

10

0

0

300

100

160

150

160

10

275

10

0

0

310

100

170

150

170

10

275

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns