SAA7348GP Datasheet, PDF (20/60 Pages) NXP Semiconductors – All Compact Disc Engine ACE

Philips Semiconductors
All Compact Disc Engine (ACE)
Preliminary specification
SAA7348GP
Table 6 Timing specifications for external program memory search
SYMBOL
t_LHLL
t_AVLL
t_LLAX
t_LLPL
t_PLPH
t_PLIV
t_PXIX
t_PXIZ
t_AVIV
t_PLAZ
t_RLRH
t_WLWH
t_RLDV
t_RHDX
t_RHDZ
t_LLDV
t_AVDV
t_LLWL
t_AVWL
t_QVWX
t_WHQX
t_RLAZ
t_WHLH
PARAMETER
ALE pulse width
address valid to ALE LOW
address hold after ALE LOW
ALE LOW to PSEN LOW
PSEN pulse width
PSEN LOW to valid instruction in
input instruction hold after PSEN
input instruction float after PSEN
address to valid instruction in
PSEN LOW to address float
read pulse width
write pulse width
RD LOW to valid data in
data hold after RD
data float after RD
ALE LOW to valid data in
address to valid data in
ALE LOW to RD or WR LOW
address valid to RD or WR LOW
data valid to WR transition
data hold to WR
RD LOW to address float
RD or WR HIGH to ALE HIGH
MIN.
60
15
21
25
80
−
0
−
−
−
170
170
−
−
0
−
−
80
115
20
20
−
20
MAX.
−
−
−
−
−
65
−
30
130
6
−
−
135
50
−
235
260
115
−
−
−
0
40
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
In addition to external program memory, external RAM and I/O can be accessed. Timing relationships for an external
data read are shown in Fig.9, and for an external data write in Fig.10.
1997 Jul 11
20