M306V2ME Datasheet, PDF (190/276 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V2ME-XXXFP
M306V2EEFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.16.4 Clock for OSD
As a clock for display to be used for OSD, it is possible to select one of the following 3 types.
• Data slicer clock output from the data slicer (approximately 26 MHz)
• Clock from the LC oscillator supplied from the pins OSC1 and OSC2
• Clock from the ceramic resonator (or the quartz-crystal oscillator) from the pins OSC1 and OSC2
Clock control register
b7 b6 b5 b4 b3 b2 b1 b0
000 0
Symbol
CS
Address
020516
When reset
0016
Bit symbol
CS0
CS1
CS2
Reserved bit
CS4
Reserved bits
Bit name
Clock selection bit
OSC1 oscillating mode
selection bits
R', G', B' signal output
control bit
Function
0: Data slicer clock
1: OSC1 clock
b2 b1
0 0: Stopped
0 1: Do not set.
1 0: LC oscillating mode
1 1: Ceramic • quartz-crystal
oscillating mode
Must always be set to “0”
0: R', G', B' output invalid
1: R', G', B' output valid
Must always be set to “0”
RW
Figure 2.16.15 Clock control register
Data slicer
circuit
(See note)
Data slicer clock
“10”
LC
Ceramic •
quartz-crystal
“11”
CS2, CS1
Oscillating mode for OSD
“0”
OSC1 clock
“1”
CS0
Note : To use data slicer clock, set bit 0 of data slicer control register 1 to “1.”
Figure 2.16.16 Block Diagram of OSD selection circuit
OSD control circuit
Rev. 1.0
190