SERC816 データシートの表示（PDF） - STMicroelectronics

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SERC816

SERCOS INTERFACE CONTROLLER

STMicroelectronics 

SERCON816

3.5.7 Write Access to DUAL Port RAM

Figure 11. Write Access to DUAL Port RAM

A10-0, BHEN,

MCSN0-1,

tASU

WRN (Motorola mode)

WRN (Intel mode)

RDN (Motorola mode)

tMWRW

D15-0

tMBSY

BUSYN

tAHD

tWR1

tDSU

tDHD

tMBHWH

Symbol

Parameter

Min.

Typ.

Max.

Unit

tASU Setup time A11-0, (Note 1)

10

ns

Setup time MCSN0-1, if both signals are activated

5

ns

simultaneously. (Note 1)

Setup time MCSN0-1, if one of these both signals is activated

0

10 ns earlier. (Note 1)

Setup time BHEN, WRN (only Motorola mode), (Note 1)

0

ns

tAHD hold time A11-0, BHEN, MCSN0-1, WRN (only Motorola

0

ns

mode) to rising edge of WRN (Intel mode) or RDN (Motorola

mode with low active strobe) or falling edge RDN (Motorola

mode with high active strobe)

tMWRW Pulse width WRN or RDN

20

ns

tDSU Setup time D15-0 to end of write access

10

ns

tDHD Hold time D15-0 after end of write access

5

ns

tMBSY Delay WRN or RDN (begin of write access) to BUSYN low

15

ns

tMBHWH Setup time BUSYN high to end of write access

15

ns

tWR1 WRN and RDN high after end of write access

15

ns

Notes: 1. Setup time input signals to falling edge WRN (Intel mode) or RDN (Motorola mode with low active strobe) or rising edge RDN (Mo-

torola mode with high active strobe)

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