Philips Semiconductors
Single-chip colour CRT controller
(FTFROM)
PARAMETER
AS LOW to UDS HIGH
Data valid set-up to UDS rise
Data valid hold from UDS HIGH
UDS HIGH to AS rise delay
AS LOW to data valid
Link-through buffers
(notes 9, 10 and Fig.8)
BUFEN LOW to output valid
Link-through delay time
Input data float prior to direction change
Output float after direction change
Output float after BUFEN HIGH
Microprocessor READ from FTFROM
(Fig.9)
R/W HIGH set-up to UDS fall
UDS LOW to returned-data access time
RE LOW to returned data access time
Data valid to DTACK LOW delay
DTACK LOW to UDS rise
UDS HIGH to DTACK rise
UDS HIGH to address hold
UDS HIGH to data hold
UDS HIGH to RE rise
UDS HIGH to R/W fall
UDS LOW to DTACK LOW
Address valid to UDS fall
Product specification
SAA5355
SYMBOL
tAUH
tDSU
tDSH
tUAS
tAFA
MIN.
305
30
0
0
−
TYP.
−
−
−
−
−
MAX.
−
−
−
15
275
UNIT
ns
ns
ns
ns
ns
tBEA
−
−
100
ns
tLTD
−
−
85
ns
tIFR
0
−
−
ns
tOFR
−
−
60
ns
tBED
−
−
60
ns
tRUD
tUDA
tREA
tDTL
tDLU
tDTR
tDSA
tDSH
tSRE
tUDR
tDSD
tAUL
0
−
−
−
−
−
40
−
0
−
0
−
10
−
10
−
10
−
0
−
250
−
0
−
−
ns
210
ns
210
ns
−
ns
−
ns
75
ns
−
ns
−
ns
−
ns
−
ns
350
ns
−
ns
March 1986
10