FEDL66525-02
OKI Semiconductor
ML66525 Family
AC Characteristics (Except USB port)
(1) External program memory control
(VDD_CORE = VDD_IO = VREF = 2.4 to 3.6 V, GND = AGND = 0 V, Ta = –30 to +70°C)
Parameter
Symbol
tcyc
Condition
fOSC = 24 MHz
Min.
41.67
Max.
—
Unit
Cycle time
Clock pulse width (HIGH level)
Clock pulse width (LOW level)
PSENn pulse width
tφWH
tφWL
tPW
16.25
16.25
(2 + 2n)tφ – 25
—
—
—
PSENn pulse delay time
Address setup time
Address hold time
Instruction setup time
Instruction hold time
tPD
tAS
tAH
tIS
—
2tφ – 25
–10
40
55
—
—
—
—
ns
VDD_CORE =
CL = 50 pF
tIH
0
Read data access time
tACC
—
(3 + 2n)tφ – 50
(Note) tφ = tcyc/2
n = 0 to 3 ( n wait cycles inserted)
tcyc
CPUCLK
PSENn
tφWH
tφWL
tPD
tPW
PC0 to 19
A0 to A19
D0 to D7
tAS
tAH
INST0 to 7
tIS
tACC
tIH
Bus timing during no wait cycle time
16/27
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