Serial Mode Register 0, 1 (Smr0, Smr1) - Fujitsu MB90335 Series Hardware Manual

MB90335 Series
18.4.2

Serial Mode Register 0, 1 (SMR0, SMR1)

The serial mode registers 0, 1 (SMR0, SMR1) are responsible for selecting operation
modes, setting pins related to serial data and cock to be enabled or disabled, and
setting how many bit to transfer ranging from 1 to 8 bits, setting the serial clock output
level in the inactive operation (fixed to "L" and "H").
■ Serial Mode Register 0, 1 (SMR0, SMR1)
Address
ch.0 : 000020
H
ch.1 : 000026
H
R/W : Readable/Writable
: Initial value
CM44-10137-6E
Figure 18.4-3 Serial Mode Register 0, 1 (SMR0, SMR1)
bit15 bit8 bit7 bit6
MD1 MD0 SCKL M2L2 M2L1 M2L0 SCKE SOE
(SCR0, SCR1)
R/W
R/W
SOE
0
1
SCKE
0
1
M2L2 to M2L0
SCKL
0
1
MD1 MD0
0
0
1
1
FUJITSU MICROELECTRONICS LIMITED
bit5 bit4 bit3 bit2
R/W
R/W R/W R/W
Serial data output enable bit
As general-purpose port
As Serial data output pin of UART
Serial clock output enable bit
As general-purpose port or Clock input pin of UART0/1
As Clock output pin of UART
Synchronous mode transfer number setting bit
Transfer number: 8 bit
"000 "
B
Transfer number: 1 bit
"001 "
B
Transfer number: 2 bit
"010 "
B
Transfer number: 3 bit
"011 "
B
Transfer number: 4 bit
"100 "
B
"101 " Transfer number: 5 bit
B
Transfer number: 6 bit
"110 "
B
"111 " Transfer number: 7 bit
B
Serial clock output level setting bit
Serial clock output "L" level when not operating
Serial clock output "H" level when not operating
Operation mode selection bit
Operation mode
0 0
Asynchronous mode (Normal mode)
1
1 Asynchronous mode (multiprocessor mode)
0 Synchronous mode (Normal mode)
2
1 Setting disabled
CHAPTER 18 UART
18.4 Register of UART
bit1 Initial value
bit0
00100000
B
R/W R/W
395