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

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SERC816

SERCOS INTERFACE CONTROLLER

STMicroelectronics 

SERCON816

3.5.6 Write Access to Control Registers

Figure 10. Write Access to Control Registers

A6-0, BHEN,

PCSN0, PCS1,

DMAACKNT,

WRN (Motorola mode)

WRN (Intel mode)

RDN (Motorola mode)

D15-0

DMAREQT

tASU

tAHD

tPWRW

tDSU

tDHD

tPRQ

Symbol

Parameter

Min.

Typ.

Max.

Unit

tASU Setup time A6-0, (Note 1)

10

ns

Setup time BHEN, PCSN0, PCS1, DMAACKNR, WRN (only

0

ns

Motorola mode),

(Note 1)

tAHD hold time A6-0, BHEN, PCSN0, PCS1, DMAACKNT, WRN

0

ns

(only Motorola mode) to rising edge WRN (Intel mode) or

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

(Motorola mode, strobe active high)

tPWRW pulse width WRN (Intel mode) or RDN (Motorola mode)

20

ns

tDSU setup time D15-0 to end of write access

10

ns

tDHD hold time D15-0 to end of write access

5

ns

tPRQ delay WRN or RDN to DMAREQT low

20

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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