MB90570C Datasheet, PDF (86/120 Pages) Fujitsu Component Limited. – 16-bit Proprietary Microcontroller

MB90570A/570C Series
(3) Clock Timings
Parameter
Clock frequency
Clock cycle time
Input clock pulse width
Input clock rising/falling time
Internal operating clock fre-
quency
Internal operating clock cycle
time
Frequency fluctuation rate
locked
Symbol
(AVCC = VCC = 5.0 V ±10%, AVSS = VSS = 0.0 V, TA = –40°C to +85°C)
Pin name
Condi-
tion
Value
Unit
Min Typ Max
Remarks
FC X0, X1
3
— 16 MHz
FCL X0A, X1A
— 32.768 — kHz
tHCYL X0, X1
62.5 — 333 ns
tLCYL X0A, X1A
— 30.5 — µs
PWH,
PWL
X0
Recommend
10
—
— ns duty ratio of
30% to 70%
PWLH,
PWLL
X0A
— 15.2 — µs
tCR,
tCF
X0, X0A
—
—
—
5
ns
External clock
operation
fCP
—
1.5
—
16
MHz
Main clock op-
eration
fLCP
—
—
8.192
—
kHz
Subclock oper-
ation
tCP
—
62.5
—
333
ns
External clock
operation
tLCP
—
— 122.1 —
µs
Subclock oper-
ation
∆f
—
—
—
5
%*
* : The frequency fluctuation rate is the maximum deviation rate of the preset center frequency when the multiplied
PLL signal is locked.
+
∆f = ^{| α |}
fO
× 100 (%)
+α
Center frequency ^fO
–α
–
The PLL frequency deviation changes periodically from the preset frequency “(about CLK × (1CYC to 50 CYC)”,
thus minimizing the chance of worst values to be repeated (errors are minimal and negligible for pulses with
long intervals).
86
DS07-13701-9E