SAA7385 Datasheet, PDF (54/64 Pages) NXP Semiconductors – Error correction and host interface IC for CD-ROM SEQUOIA

Philips Semiconductors
Error correction and host interface IC for
CD-ROM (SEQUOIA)
Preliminary specification
SAA7385
15.7 Microprocessor interface
V_DD = 4.75 to 5.25 V; V_SS = 0 V; T_amb = −10 to +70 °C; unless otherwise specified.
SYMBOL
PARAMETER
MIN.
Program memory fetch timing; see Fig.23
t_AVLL
address valid to ALE LOW
15
t_LLAX
address hold after ALE LOW
35
t_LLPL
ALE LOW to PSEN LOW
25
t_PLPH
PSEN pulse width
80
t_PLIV
PSEN LOW to valid input instruction
−
t_PXIX
Input instruction hold after PSEN
0
t_PXIZ
Input instruction float after PSEN
−
t_AVIV
address to valid input instruction
−
t_PLAZ
PSEN low to address float
−
MAX.
−
−
−
−
65
−
30
130
6
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
handbook, full pagewidth
PSEN
LA7 to LA0
A15 to A8
tAVLL + tLLPL
tPLPH
tPLIV
tLLAX + tAVLL
tPLAZ
tPXIZ
tPXIX
tAVIV
MGE411
Fig.23 Program code fetch cycle.
1996 Jun 19
54