E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 767

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Bits 2 to 0—System Clock Select 2 to 0 (SCK2 to SCK0): These bits select the clock for the bus
master.
20.3
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
20.3.1
Circuit Configuration
A crystal resonator can be connected as shown in the example in figure 20.2. Select the damping
resistance R
Table 20.2 Damping Resistance Value
Bit 2
SCK2
0
1
Frequency (MHz)
R
d
( )
Connecting a Crystal Resonator
Bit 1
SCK1
0
1
0
1
Oscillator
d
according to table 20.2. An AT-cut parallel-resonance crystal should be used.
Figure 20.2 Connection of Crystal Resonator (Example)
Bit 0
SCK0
0
1
0
1
0
1
—
EXTAL
XTAL
Description
Bus master is in high-speed mode
Medium-speed clock is /2
Medium-speed clock is /4
Medium-speed clock is /8
Medium-speed clock is /16
Medium-speed clock is /32
—
2
1 k
R
d
4
500
C
C
L1
L2
8
200
Rev. 5.00 Sep 14, 2006 page 737 of 1060
C
L1
= C
Section 20 Clock Pulse Generator
12
0
L2
= 10 to 22 pF
16
0
REJ09B0331-0500
(Initial value)
20
0