m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 112

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
Fig. 2.3.20 Setting of related registers [Data transmission or reception using automatic transfer]
98
SIO1CON
SIOAC
ICON1
SIOAI
SIODP
Serial I/O1 control register (Address:19
Serial I/O automatic transfer control register (Address:1A
Serial I/O automatic transfer interval register (Address:1C
Interrupt control register 1 (Address:3E
Serial I/O automatic transfer data pointer (Address:18
0
1
0
0
1
0
1
0
1
0
0 1 1 1
1 1 0
0 1
0
3819 Group USER’S MANUAL
0
0
1
Automatic transfer mode
Set to a transfer completion state (stop
transferring) in initialization.
(After setting a transmission data, set to
“1” at starting automatic transfer.)
Fullduplex (transmit/receive) mode
Synchronous clock output pin : S
Internal synchronous clock : f(X
Use Serial I/O 1
Not use S
LSB first
Internal clock
CMOS output
Set an interval of transfer clock,32 bits.
(set so that “setting value + 2 = 32.”)
Set “the number of transfer bytes – 1”
(in this example, (8 bytes – 1) = 7 is set after
completing to transfer 1-byte data, and
before starting to transfer the next data.)
Serial I/O automatic transfer interrupt : Disabled
16
16
)
)
RDY1
signal output function
16
)
16
16
)
MITSUBISHI MICROCOMPUTER
)
IN
CLK11
)/32
2.3 Serial I/O
3819 Group