Master/Slave Type Communication Function (Multiprocessor Mode) - Fujitsu MB90895 Series Hardware Manual

15.6.4 Master/Slave Type Communication Function
(Multiprocessor Mode)
Operation mode 1 (asynchronous multiprocessor mode) enables communications by
the master/slave connection of more than one CPU.Only the master CPU functions.
I Master/Slave Mode Communication Function
To operate the UART1 in operation mode 1 (asynchronous multiprocessor mode), the setting shown in is
required.
Figure 15.6-9 Setting of Operation Mode 1 (Asynchronous Multiprocessor Mode) for UART1
SCR1 SMR1
SSR1
SIDR1/SODR1
DDR port direction register
: Undefined bit
: Useing bit
: Unused bit
1 : Setting to "1"
0 : Setting to "0"
G
Inter-CPU connection
One master CPU and two or more slave CPUs are connected to a pair of common communication lines to
make up the master/slave communication system.The UART1 can be used only as the master CPU.
bit15 14 13 12 11 10
PEN P SBL CL AD REC
0 1 0
PE ORE FRE RDRFTDRE
9 bit8 bit7 6 5 4
RXE TXE MD1 MD0 CS2 CS1 CS0
0 1
Setting transmission data (write)
RIE TIE
/holding reception data (read)
Setting "0" to corresponding bit
using as SIN1 input pin and SCK1
input pin
CHAPTER 15 UART1
3 2 1 bit0
Re-
SCKE SOE
served
0 0
471