BECKHOFF ET1100 - Manual (Page 86)

PDI description
III-72 Slave Controller – ET1100 Hardware Description
t
CS_RD_to_DATA_release
BHE
t ADR_BHE_setup
CS
BHE
RD
WR
DATA
BUSY
DATA
ADR ADR
t
CS_to_BUSY
t
read
t
RD_to_BUSY
t
RD_delay
t CS_delay
t
BUSY_to_DATA_valid
t
ADR_BHE_to_DATA_invalid
t
RD_to_DATA_driven
t
CS_to_BUSY_release
BHE
ADR
t RD_CS_overlap
(with preceding write access)
Internal
state
Reading ADR Idle
t
read_int
Idle
Figure 25: Read access (without preceding write access)
BHE1
CS
BHE
WR
RD
DATA
BUSY
ADR1 ADR
t WR_active
t CS_delay
t WR_delay
t
ADR_BHE_DATA_hold
DATA1
t
ADR_BHE_DATA_setup
t
CS_to_BUSY
(with preceding write access)
t WR_to_BUSY
t write
t
CS_to_BUSY
t
CS_to_BUSY
t
BUSY_to_WR_CS
Internal
state
Writing ADR1 Idle Idle
t
CS_WR_overlap
t write_int
Writing ADR2
t write
BHE2
ADR2
DATA2
t
BUSY_to_WR_CS
t
CS_WR_overlap
Figure 26: Write access (write after rising edge nWR, without preceding write access)