Cypress MB90910 Series, Manual

Page: 43 / 64

Document Number: 002-04578 Rev. *A Page 43 of 64
MB90910 Series
11.4 AC Characteristics
11.4.1 Clock Timing
Parameter Symbol Pin name
Value
Unit Remarks
Min Typ Max
Clock frequency f
C
X0, X1
3

16 MHz
1/2 when PLL stops,
When using an oscillation circuit
4

16 MHz
PLL

1,
When using an oscillation circuit
4

16 MHz
PLL

2,
When using an oscillation circuit
4

10 MHz
PLL

3,
When using an oscillation circuit
4

8 MHz
PLL

4,
When using an oscillation circuit
4

5 MHz
PLL

6,
When using an oscillation circuit
4

4 MHz
PLL

8,
When using an oscillation circuit
Clock cycle time t
CYL
X0, X1 62.5

333 ns When using an oscillation circuit
Internal operating clock fre-
quency
(machine clock)
f
CP

1.5

32 MHz When using main clock
Internal operating clock cy-
cle time
(machine clock)
t
CP

31.25

666 ns When using main clock
t
CYL
X0, X1

When using an oscillation circuit
Amplitude:
It varies depending on the
external resistance, power
rating and the different kind of
device.
Reference values: 1V to 2.5V
Note : The amplitude of MB90V950AMAS is the same as Vcc.