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CHAPTER 18 EXPANDED I/O SERIAL INTERFACE
18.3.3 Communication Prescaler Control Register0/1
(SDCR0/SDCR1)
This section describes the configuration and functions of the communication
prescaler control register0/1 (SDCR0/SDCR1).
■
Communication prescaler control register0/1 (SDCR0/SDCR1)
The bit configuration of the communication prescaler control register0/1 (SDCR0/SDCR1) is
illustrated below.
The functions of the bits for the communication prescaler control register0/1 (SDCR0/SDCR1)
are described below.
[bit15] MD: Machine clock divide moDe select
This bit is used to enable operation of the communication prescaler.
[bit11, bit10, bit9, bit8] DIV3, DIV2, DIV1, DIV0: DIVide3 to 0
These bits determine the division ratio of the machine clocks.
Note:
When changing the clock division ratio, wait for time of 2 division as a clock stabilization time
before the communication is performed.
S
DCR0/
S
DCR1
ch.0
a
ddre
ss
: 000029
H
ch.1 00002D
H
7 6 5 4
3
2 1 0
Initi
a
l v
a
l
u
e
MD
- - -
DIV
3
DIV2 DIV1 DIV0 0---0000
B
R/W
- - -
R/W
R/W
R/W
R/W
0
The communication prescaler stops.
1
The communication prescaler operates.
DIV3 to 0
Division Ratio
0000
B
Division by 1
0001
B
Division by 2
0010
B
Division by 3
0011
B
Division by 4
0100
B
Division by 5
0101
B
Division by 6
0110
B
Division by 7
0111
B
Division by 8
Summary of Contents for MB90480 Series
Page 2: ......
Page 4: ......
Page 10: ...vi ...
Page 128: ...106 CHAPTER 4 RESET ...
Page 174: ...152 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 198: ...176 CHAPTER 7 MODE SETTING ...
Page 220: ...198 CHAPTER 9 TIMEBASE TIMER ...
Page 238: ...216 CHAPTER 11 WATCH TIMER ...
Page 280: ...258 CHAPTER 12 16 BIT INPUT OUTPUT TIMER ...
Page 406: ...384 CHAPTER 17 8 10 BIT A D CONVERTER ...
Page 478: ...456 CHAPTER 20 CHIP SELECTION FACILITY ...
Page 494: ...472 CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION ...
Page 498: ...476 CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE ...
Page 526: ...504 CHAPTER 23 2M 3M BIT FLASH MEMORY ...
Page 536: ...514 CHAPTER 24 EXAMPLES OF MB90F481B MB90F482B MB90F488B MB90F489B SERIAL PROGRAMMING ...
Page 570: ...548 CHAPTER 25 PWC TIMER ONLY MB90485 SERIES ...
Page 688: ......