SERCON410B Datasheet, PDF (17/34 Pages) STMicroelectronics – SERCOS INTERFACE CONTROLLER

AC ELECTRICAL CHARACTERISTICS (Continued)
Figure 9. Read Access of Control Registers
SERCON410B
3.4.5 Read Access of Control Registers
Symbol
Parameter
Value
Unit
Min.
Type
Max.
Setup time A6-0, BHEN, PCSN0, PCS1,
DMAACKNR, WRN (only Motorola mode) to
tASU
falling edge RDN (Intel or Motorola mode
0
ns
with low active strobe) or rising edge RDN
(Motorola mode with high active strobe)
Hold time A10-0, BHEN, MCSN0-1, WRN
(only Motorola mode) to rising edge RDN
t_AHD
(Intel Motorola mode with low active strobe)
0
ns
or falling edge RDN (Motorola mode with high
active strobe)
Access time A6-0, BHEN, PCSN0, PCS1,
tPAD
DMAACKNR, WRN (only Motorola mode) to
D15-0 valid
50
ns
tPRDD
Access time RDN to D15-0 valid
40
ns
t_RDZ
Delay RDN to D15-0 high-Z
t_PRQ
Delay RDN to DMAREQR low
15
ns
30
ns
13/30
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