UPD78F0138 NEC, UPD78F0138 Datasheet - Page 335

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

Address: FF88H After reset: 00H R/W
CSIM11
Notes 1.
Symbol
2.
3.
4.
5.
6.
7.
8.
TRMD11
SSE11
DIR11
Bit 0 is a read-only bit.
When using as a general-purpose port, see Caution 3 of Figure 15-6 and Table 15-2.
Bit 0 (CSOT11) of CSIM11 and serial I/O shift register 11 (SIO11) are reset.
Do not rewrite TRMD11 when CSOT11 = 1 (during serial communication).
The SO11 output is fixed to the low level when TRMD11 is 0. Reception is started when data is read
from SIO11.
Do not rewrite SSE11 when CSOT11 = 1 (during serial communication).
Before setting this bit to 1, fix the SSI11 pin input level to 0 or 1.
Do not rewrite DIR11 when CSOT11 = 1 (during serial communication).
CSOT11
CSIE11
CSIE11
0
<7>
Note 5
0
1
1
0
1
0
1
0
1
Notes 6, 7
Note 8
Note 4
Figure 15-4. Format of Serial Operation Mode Register 11 (CSIM11)
Disables operation
Enables operation
Receive mode (transmission disabled).
Transmit/receive mode
SSI11 pin is not used
SSI11 pin is used
MSB
LSB
Communication is stopped.
Communication is in progress.
TRMD11
CHAPTER 15 SERIAL INTERFACES CSI10 AND CSI11
6
Note 1
SSE11
Note 2
5
User’s Manual U16228EJ2V0UD
and asynchronously resets the internal circuit
Operation control in 3-wire serial I/O mode
DIR11
4
Transmit/receive mode control
Communication status flag
SSI11 pin use selection
First bit specification
3
0
2
0
Note 3
.
1
0
CSOT11
0
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