HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 125

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

7.2.2
An external clock signal can be input at the EXTAL pin as shown in figure 7.4. The XTAL pin
should be left open. The frequency must be equal to the system clock (CK) frequency. The
specifications for the waveform of the external clock input are given below. Make the external
clock frequency the same as the system clock (CK).
Table 7.3
t
t
Notes: 1. Except SH7034B
EXr/f
EXH/L
(V
IL
2. SH7034B only
–V
External Clock Input
IH
)
Input Clock Specifications
1/2 V
External clock input
5 V Specifications
(fmax = 20 MHz) *
Max = 5
Min = 10
cc
V
IL
Figure 7.4 External Clock Input Method
t
V
EXr
Figure 7.5 Input Clock Waveform
IH
1
t
EXH
3.3 V Specifications
(fmax = 12.5 MHz)
Max = 10
Min = 20
t
cyc
t
Open
EXf
t
EXL
Section 7 Clock Pulse Generator (CPG)
Rev. 7.00 Jan 31, 2006 page 99 of 658
3.3 V Specifications
(fmax = 20 MHz) *
Max = 5
Min = 15
XTAL
EXTAL
REJ09B0272-0700
2
Unit
ns
ns