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M306V5ME-XXXSP Datasheet(PDF) 25 Page - Mitsubishi Electric Semiconductor

Part No. M306V5ME-XXXSP
Description  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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Maker  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
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M306V5ME-XXXSP Datasheet(HTML) 25 Page - Mitsubishi Electric Semiconductor

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M306V5ME-XXXSP
M306V5EESP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
25
Rev. 1.0
2.4.1 Software Wait
A software wait can be inserted by setting the wait bit (bit 7) of processor mode register 1 (address
000516).
A software wait is inserted in the internal ROM/RAM area by setting the wait bit of the processor mode
register 1. When set to “0”, each bus cycle is executed in one BCLK cycle. When set to “1”, each bus cycle
is executed in two BCLK cycles. After the microcomputer has been reset, this bit defaults to “0”.
The SFR area and the OSD RAM area is always accessed in two BCLK cycles regardless of the setting
of these control bits.
Table 2.4.1 shows the software wait and bus cycles. Figure 2.4.4 shows example bus timing when using
software waits.
Table 2.4.1 Software waits and bus cycles
Area
Wait bit
Bus cycle
1
2 BCLK cycles
SFR/
OSD RAM
Internal
ROM/RAM
0
1 BCLK cycle
Invalid
2 BCLK cycles


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