MB90560 Datasheet, PDF (416/581 Pages) Fujitsu Component Limited. – 16-BIT MICROCONTROLLER

13.7 Operation of UART
13.7.3 Bidirectional Communication Function (Normal Mode)
In operation mode 0 or 2, normal serial bidirectional communication (one-to-one
connection) is available. Select operation mode 0 for asynchronous communication
and operation mode 2 for synchronous communication.
s Bidirectional Communication Function
The settings shown in Figure 13.7-4 are required to operate UART in normal mode (operation
mode 0 or 2).
SCR1, SMR1
Mode 0
Mode 2
SSR1,
SIDR1/SODR1
Mode 0
Mode 2
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
PEN P SBL CL AD REC RXE TXE MD1 MD0 CS2 CS1 CS0 BCH SCKE SOE
×₀
0× × 1× 0
00
10
PE ORE FRE RDRF TDRE -
RIE TIE
Set transmit data (during writing).
Retain receive data (during reading).
×
×
DDR6*1
*1 : Set bit 7 of DDR2 and bit 0 of DDR4 to use UART0.
: Bit used
x : Bit not used
1 : Set "1".
0 : Set "0".
: Set "0" to use an input pin.
Figure 13.7-4 Settings for UART1 operation mode 0
q Inter-CPU Connection
As shown in Figure 13.7-5, interconnect two CPUs.
SOT1
SIN1
Output
SCK1
CPU-1
SOT1
Input
SIN1
SCK1
CPU-2
Figure 13.7-5 Connection example of UART1 bidirectional communication
392 CHAPTER 13 UART
MB90560 series