upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 257
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upd78f0730
Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0730.pdf
(518 pages)
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11.3 Registers Controlling Serial Interface CSI10
(1) Serial operation mode register 10 (CSIM10)
Address: FF80H After reset: 00H R/W
CSIM10
Serial interface CSI10 is controlled by the following four registers.
• Serial operation mode register 10 (CSIM10)
• Serial clock selection register 10 (CSIC10)
• Port mode register 1 (PM1)
• Port port register 1 (P1)
Notes 1.
Caution Be sure to clear bits 1 to 3 and 5 to 0.
Symbol
CSIM10 is used to select the operation mode and enable or disable operation.
CSIM10 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 00H.
2.
3.
4.
5.
6.
TRMD10
DIR10
Bit 0 is a read-only bit.
To use P10/SCK10 and P12/SO10 as general-purpose ports, set CSIM10 in the default status (00H).
Bit 0 (CSOT10) of CSIM10 and serial I/O shift register 10 (SIO10) are reset.
Do not rewrite TRMD10 when CSOT10 = 1 (during serial communication).
The SO10 output (see (a) in Figure 11-1) is fixed to the low level when TRMD10 is 0. Reception is
started when data is read from SIO10.
Do not rewrite DIR10 when CSOT10 = 1 (during serial communication).
CSOT10
CSIE10
CSIE10
0
<7>
Note 5
0
1
1
0
1
0
1
Note 6
Note 4
Figure 11-2. Format of Serial Operation Mode Register 10 (CSIM10)
Disables operation
Enables operation
Receive mode (transmission disabled).
Transmit/receive mode
MSB
LSB
Communication is stopped.
Communication is in progress.
TRMD10
6
Note 1
CHAPTER 11 SERIAL INTERFACE CSI10
Preliminary User’s Manual U19014EJ1V0UD
Note 2
5
0
and asynchronously resets the internal circuit
Operation control in 3-wire serial I/O mode
DIR10
4
Transmit/receive mode control
Communication status flag
First bit specification
3
0
2
0
Note 3
.
1
0
CSOT10
0
257
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