Samsung SC32442B54 User Manual page 547

ELECTRICAL DATA
= 1.7V ± 0.05 V, V
(V
DDiarm
Parameter
Crystal clock input frequency
Crystal clock input cycle time
External clock input frequency
External clock input cycle time
External clock input low level pulse width
External clock to HCLK (without PLL)
HCLK (internal) to CLKOUT
HCLK (internal) to SCLK
External clock input high level pulse width
Reset assert time after clock stabilization
PLL Lock Time
Sleep mode return oscillation setting time
Interval before CPU runs after nRESET is released
25-36
Table 25-5 Clock Timing Constants
= 1.2V ± 0.05 V, T
DDi A
= -25 to 85 °C, V
DDMOP
Symbol Min
f
12
XTAL
t
50
XTALCYC
f
–
EXT
t
15.0
EXTCYC
t
7
EXTLOW
t
3
EX2HC
t
3
HC2CK
t
1
HC2SCLK
t
4
EXTHIGH
t
10
RESW
t
300
PLL
t
–
OSC2
t
–
RST2RUN
SC32442B RISC MICROPROCESSOR
= 3.3V ± 0.3V)
Typ Max
– 20
– 83.3
– 66
– –
– –
– 7
– 9
– 2
– –
– –
–
– 65536
7 –
Unit
MHz
ns
MHz
ns
ns
ns
ns
ns
ns
XTIpll or
EXTCLK
µS
XTIpll or
EXTCLK
XTIpll or
EXTCLK