Table of Contents
Advertisement
14.3.2
Serial mode register 0 (SMR0)
Serial mode register 0 (SMR0) is used to select the operation mode, select the baud rate
clock, and to disable/enable the output of serial data and clock signal to pins.
I Serial mode register 0 (SMR0)
7
6
5
R/W
R/W
R/W
R/W
: Read/Write
: Reset value
Figure 14.3-3 Serial mode register 0 (SMR0)
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
bit0
SOE
bit1
SCKE
bit2
Reserved
bit5
CS2 CS1 CS0
"000
bit7
MD1 MD0
Reset value
00000000
B
Serial data output enable bit (SOT0 pin)
General purpose I/O port
0
1
Output of UART0 serial data
Serial clock I/O enable bit (SCK0 pin)
0
Clock I/O pin of general purpose I/O port or UART0
1
Serial clock I/O pin of UART0
Reserved bit
0
Be sure to set to "0"
bit4
bit3
Clock input cource select bit
" to "100
"
Baud rate by dedicated baud rate generater
B
B
"101
"
Setting disabled
B
Baud rate internal timer
"110
"
B
(16-bit reload timer 0)
"111
"
Baud rate by external clock
B
bit6
Operating mode select bit
Mode No.
0
0
0
Asynchronous normal mode
0
1
1
Asynchronous multiprocessor mode
1
0
2
Clock synchronous mode
1
1
-
Setting disabled
CHAPTER 14 UART0
Operating mode
391
Advertisement
Table of Contents
