Renesas SH7781 Figure 32.1 EXTAL Clock Input Timing

32. Electrical Characteristics
Rev.1.00 Jan. 10, 2008 Page 1569 of 1658
REJ09B0261-0100
Item Symbol Min. Max. Unit Figure
MODE13 to MODE11,
MODE8 to MODE5
tMDRH 20 ⎯ ns 32.6 MODE reset hold time
MODE14, MODE10,
MODE9, MODE4 to
MODE0
32.4
PRESET assert time tRESW 20 ⎯ t
cyc 32.4
PLL synchronization settling time tPLL 400 ⎯ μs 32.5
TRST reset hold time tTRSTRH 0 ⎯ ns 32.4
PRESET input rise time tPRr ⎯ 20 μs 32.6
PRESET input fall time tPRf ⎯ 20 μs 32.6
Notes: 1. With a crystal reson ator connected on EXTAL and XTAL, the maximum frequency is 34
MHz. When using a third-order overtone crystal resonator, a tank circuit must be
connected externally.
2. The load capacitance connected on the CLKOUT pin should be not greater than 50 pF.
3. tcyc is the period of one CLKOUT clock cycle.
4. This applies to clock operating modes 0, 1, 2, and 3 (see table 15.2).
5. This applies to clock operating modes 8, 9, 10, and 11 (see table 15.2).
6. This applies to clock operating modes 16, 17, 18, and 19 (see table 15.2).
Note: When the clock is input from the EXTAL pin.
t
EXcyc
t
EXH
t
EXL
t
EXr
t
EXf
1/2V
DDQ
V
IH
V
IH
V
IL
V
IL
V
IH
1/2V
DDQ
Figure 32.1 EXTAL Clock Input Timing