參數(shù)資料
型號(hào): SAA7348GP
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: All Compact Disc Engine ACE
中文描述: 8-BIT, MROM, 35 MHz, MICROCONTROLLER, PQFP100
文件頁數(shù): 20/60頁
文件大?。?/td> 205K
代理商: SAA7348GP
1997 Jul 11
20
Philips Semiconductors
Preliminary specification
All Compact Disc Engine (ACE)
SAA7348GP
Table 6
Timing specifications for external program memory search
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.
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
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
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
60
15
21
25
80
0
170
170
0
80
115
20
20
20
65
30
130
6
135
50
235
260
115
0
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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