M306V5ME-XXXSP Datasheet, PDF (30/262 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
Figures 2.5.4 and 2.5.5 shows the system clock control registers 0 and 1.
System clock control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
0 001 00
Symbol
CM0
Address
000616
When reset
4816
Bit symbol
Reserved bits
Bit name
Function
Must always be set to “0”
RW
CM02
WAIT peripheral function
clock stop bit
Reserved bit
0 : Do not stop peripheral function clock in wait mode
1 : Stop peripheral function clock in wait mode
Must always be set to “1”
Reserved bits
Must always be set to “0”
CM06
Main clock division select 0 : CM16 and CM17 valid
bit 0 (Note 2)
1 : Division by 8 mode
Reserved bit
Must always be set to “0”
Notes 1: Set bit 0 of the protect register (address 000A16) to “1” before writing to this register.
2: This bit changes to “1” when shifting from high-speed/medium-speed mode to stop mode and at a reset.
Figures 2.5.4 System clock control register 0
System clock control register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
0000
Symbol
CM1
Address
000716
When reset
2016
Bit symbol
Bit name
CM10
All clock stop control bit
(Note 4)
Reserved bits
CM15
XIN-XOUT drive capacity
select bit (Note 2)
CM16
CM17
Main clock division
select bit 1 (Note 3)
Function
0 : Clock on
1 : All clocks off (stop mode)
Must always be set to “0”
0 : LOW
1 : HIGH
b7 b6
0 0 : No division mode
0 1 : Division by 2 mode
1 0 : Division by 4 mode
1 1 : Division by 16 mode
RW
Notes 1: Set bit 0 of the protect register (address 000A16) to “1” before writing to this register.
2: This bit changes to “1” when shifting from high-speed/medium-speed mode to stop mode and at a
reset.
3: Can be selected when bit 6 of the system clock control register 0 (address 000616) is “0.”
If “1”, division mode is fixed at 8.
4: If this bit is set to “1,” XOUT turns “H,” and the built-in feedback resistor is cut off.
Figure 2.5.5 System clock control register 1
Rev. 1.0
30