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MB95310L/370L Series
50
DS07-12628-2E
(2) Source Clock/Machine Clock
(VCC = 3.0 V
±10%, VSS = 0.0 V, TA = 40°C to +85°C)
*1: This is the clock before it is divided according to the division ratio set by the machine clock divide ratio select
bits (SYCC:DIV1 and DIV0). This source clock is divided to become a machine clock according to the division
ratio set by the machine clock divide ratio select bits (SYCC:DIV1 and DIV0). In addition, a source clock can
be selected from the following.
Main clock divided by 2
PLL multiplication of main clock (select from 2, 2.5, 4 multiplication)
Main CR clock divided by 2
Subclock divided by 2
Sub-CR clock divided by 2
(Continued)
Parameter
Symbol
Pin
name
Value
Unit
Remarks
Min
Typ
Max
Source clock
cycle time*1
tSCLK
—
61.5
—
2000
ns
When the main oscillation clock is used
Min: FCH = 8.125 MHz, multiplied by the
PLL multiplier of 2
Max: FCH = 1 MHz, divided by 2
80
—
1000
ns
When the main CR clock is used
Min: FCRH = 12.5 MHz
Max: FCRH = 1 MHz
—61—
s
When the sub-oscillation clock is used
FCL = 32.768 kHz, divided by 2
—20—
s
When the sub-CR clock is used
FCRL = 100 kHz, divided by 2
Source clock
frequency
FSP
—
0.50
—
16.25
MHz When the main oscillation clock is used
1
—
12.5
MHz When the main CR clock is used
FSPL
—
16.384
—
kHz When the sub-oscillation clock is used
—
50
—
kHz
When the sub-CR clock is used
FCRL = 100 kHz, divided by 2
Machine clock
cycle time*2
(minimum
instruction
execution
time)
tMCLK
—
61.5
—
32000
ns
When the main oscillation clock is used
Min: FSP = 16.25 MHz, no division
Max: FSP = 0.5 MHz, divided by 16
80
—
16000
ns
When the main CR clock is used
Min: FSP = 12.5 MHz
Max: FSP = 1 MHz, divided by 16
61
—
976.5
s
When the sub-oscillation clock is used
Min: FSPL = 16.393 kHz, no division
Max: FSPL = 16.393 kHz, divided by 16
20
—
320
s
When the sub-CR clock is used
Min: FSPL = 50 kHz, no division
Max: FSPL = 50 kHz, divided by 16
Machine clock
frequency
FMP
—
0.031
—
16.25
MHz When the main oscillation clock is used
0.0625
—
12.5
MHz When the main CR clock is used
FMPL
1.024
—
16.384
kHz When the sub-oscillation clock is used
3.125
—
50
kHz
When the sub-CR clock is used
FCRL = 100 kHz