M306V5ME-XXXSP Datasheet, PDF (28/263 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V5ME-XXXSP
M306V5EESP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.5 Clock Generating Circuit
The clock generating circuit contains each oscillator circuit that supplies the operating clock sources to the
CPU and internal peripheral units and that supplies the operating clock source to OSD.
Table 2.5.1. Clock oscillation circuits
Main clock oscillation circuit
Use of clock
• CPU’s operating clock source
• Internal peripheral units’
operating clock source
Usable oscillator
• Ceramic resonator
(or quartz-crystal oscillator)
Pins to connect oscillator
Oscillation stop/restart function
Oscillator status immediately after reset
Other
XIN, XOUT
Available
Oscillating
Externally derived clock can be input
OSD oscillation circuit
• OSD’s operating clock source
• Ceramic resonator
(or quartz-crystal oscillator)
• LC oscillator
OSC1, OSC2
2.5.1 Example of Oscillator Circuit
Figure 2.5.1 shows some examples of the main clock circuit, one using an oscillator connected to the
circuit, and the other one using an externally derived clock for input. Circuit constants in Figure 2.5.1 vary
with each oscillator used. Use the values recommended by the manufacturer of your oscillator.
Microcomputer
(Built-in feedback resistor)
XIN
XOUT
(Note)
Rd
CIN
COUT
Microcomputer
(Built-in feedback resistor)
XIN
XOUT
Open
Externally derived clock
Vcc
Vss
Note: Insert a damping resistor if required. The resistance will vary depending on the oscillator and the oscillation drive
capacity setting. Use the value recommended by the maker of the oscillator.
When the oscillation drive capacity is set to low, check that oscillation is stable. When being specified to connect a
feedback resistor externally by the manufacture, connect a feedback resistor between pins XIN and XOUT.
Figure 2.5.1 Examples of main clock
Rev. 1.0
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