SH7708 Datasheet, PDF (452/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

16.3.1 Clock Timing
Table 16.5 Clock Timing (V_CC = 3.3 ± 0.3 V, Ta = –20 to +75°C, Maximum External Bus
Operating Frequency: 15 MHz)
Item
EXTAL clock input frequency
EXTAL clock input cycle time
EXTAL clock input low level pulse width
EXTAL clock input high level pulse width
EXTAL clock input rise time
EXTAL clock input fall time
CKIO clock frequency (input)
CKIO clock cycle time (input)
CKIO clock low-level pulse width (input)
CKIO clock high-level pulse width (input)
CKIO clock rise time (input)
CKIO clock fall time (input)
CKIO clock output frequency (output)
CKIO clock cycle time (output)
CKIO clock low-level pulse width (output)
CKIO clock high-level pulse width (output)
CKIO clock rise time (output)
CKIO clock fall time (output)
Power-on oscillation settling time
Power-on oscillation settling time/mode
setting
BREQ reset hold time
RESET set-up time
BREQ set-up time
MD reset hold time
Reset assert time
Symbol
f_EX
t_EXcyc
t_EXL
t_EXH
t_EXr
t_EXf
f_CKI
t_CKIcyc
t_CKIL
t_CKIH
t_CKIr
t_CKIf
f_OP
t_cyc
t_CKOL
t_CKOH
t_CKOr
t_CKOf
t_OSC1
t_OSCMD
t_BREQRH
t_RESS
t_BREQS
t_MDRH
t_RESW
Min
Max
2
30
33.3
500
8*¹ or 12*² —
8*¹ or 12*² —
—
4
—
4
8
15
66.7
125
8
—
8
—
—
4
—
4
1
15
66.7
1000
20
—
20
—
—
7
—
7
10
—
10
—
0
—
20
—
20
—
20
—
20
—
Standby return oscillation settling time 1 t_OSC2
10
—
Unit
MHz
ns
ns
ns
ns
ns
MHz
ns
ns
ns
ns
ns
MHz
ns
ns
ns
ns
ns
ms
ms
Figure
16.1
16.2
16.3
16.4
ns
ns
ns
ns
tcyc 16.4,
16.5,
16.11
ms
16.5
434