AKM Confidential
AK2571
(6) Digital Input / Output AC characteristics
（
Beside Serial Interface
）
Parameter Pin
Symbol
min typ max
Unite
Remarks
Reset pulse width
RESETN
Tpwr
200
-
-
ns Refer figure 1
Note) Duty Cycle
：（
Tpwh
／
(Tpwh
＋
Tpwl
））×
100 %
Tpwr
RESETN
50%
50%
Tpwh
Tpwl
SKN
50%
50%
50%
Figure 1 Reset pulse width Figure 2 Input Clock Duty Cycle
(7) Digital Input / Output AC characteristics
（
Serial Interface
）
Parameter Pin
Symbol
min typ max
Unite
Remarks
SK interval
SK
Tskp
1
-
-
μ
s Refer figure 3
SK Duty Cycle
SK
40
50
60
％
Refer figure 2
CSN setup time before SK fall
CSN
SK
Tcss 100
-
- ns
Refer figure 3
*1)
CSN hold time after SK rise
CSN
SK
Tcsh 100
-
- ns
Refer figure 4
SK setup time before CSN fall
CSN
SK
Tsksl 100
ns
Refer figure 6
Input clock and data setup /
hold time
SK
DI
Tdis
Tdih
200 - -
ns
Refer figure 3, 5
SK fall to DO output latency
SK
DO
READY
Tpd -
- 300 ns
Refer figure 4,6
CL
＝
50pF
Programming time
Te/w 10
-
- ms
Refer figure 5
*2)
CSN high level hold time after
raise READY
READY
CSN
Trch 100
ns
Refer figure 5
*2)
CSN high level to DO output
latency
CSN
DO
Toz
100
ns Refer figure 4,6
*1) SK must be high when CSN transitions to Low.
*2) When writing in EEPROM
It is forbidden to read or write continuously by keeping CSN low.
<Rev. 0.6E Preliminary> -43-
2001/11
