Bidirectional Communication Function (Operation Modes 0 And 2) - Fujitsu MB90895 Series Hardware Manual

15.6.3 Bidirectional Communication Function (Operation
Modes 0 and 2)
In operation modes 0 and 2 (asynchronous normal mode, clock synchronous mode),
normal serial bidirectional communications using 1-to-1 connection can be
performed.For operation mode 0 (asynchronous normal mode), the asynchronous mode
is used; for operation mode 2 (clock synchronous mode), the clock synchronous mode
is used.
I Bidirectional Communication Function
To operate the UART1 in the operation mode 0, 2 (asynchronous normal mode, clock synchronous mode),
shown in is required.
Figure 15.6-6 Setting of Operation Modes 0, 2 (Asynchronous Normal Mode and Clock Synchronous
SCR1 SMR1
Operating mode 0
Operating mode 2
SSR1
SIDR1/SODR1
Operating mode 0
Operating mode 2
DDR port direction register
: Unudefined bit
: Used bit
: Unused bit
1 : Setting to "1"
0 : Setting to "0"
G
Inter-CPU connect
Connect the two CPUs.
Mode) for UART1
bit15 14 13 12 11 10
PEN P SBL CL AD REC
0
0 1 0
PE ORE FRE RDRFTDRE
9 bit8 bit7 6 5 4
RXE TXE MD1 MD0 CS2 CS1 CS0
0 0
1 0
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
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