Datasheet
78K0/Kx2-L CHAPTER 16 SERIAL INTERFACES CSI10 AND CSI11
R01UH0028EJ0400 Rev.4.00 568
Sep 27, 2010
Figure 16-5. Format of Serial Operation Mode Register 11 (CSIM11)
(78K0/KA2-L (25, 32-pin products), 78K0/KC2-L)
Address: FF88H After reset: 00H R/W
Note 1
Symbol <7> 6 5 4 3 2 1 0
CSIM11 CSIE11 TRMD11 SSE11
Note 2
DIR11 0 0 0 CSOT11
CSIE11 Operation control in 3-wire serial I/O mode
0 Disables operation
Note 3
and asynchronously resets the internal circuit
Note 4
.
1 Enables operation
TRMD11
Note 5
Transmit/receive mode control
0
Note 6
Receive mode (transmission disabled).
1 Transmit/receive mode
SSE11
Notes 7, 8
SSI11 pin use selection
0 SSI11 pin is not used
1 SSI11 pin is used
DIR11
Note 9
First bit specification
0 MSB
1 LSB
CSOT11 Communication status flag
0 Communication is stopped.
1 Communication is in progress.
Notes 1. Bit 0 is a read-only bit.
2. 78K0/KA2-L (25, 32-pin products) and 78K0/KC2-L(48-pin products) only. For the products of the other
than 78K0/KA2-L (25, 32-pin products) and 78K0/KC2-L(48-pin products), be sure to clear to 0.
3. To use P62/SO11, P60/SCK11/SCLA0, and P42/SSI11/PCL/INTP6 as general-purpose ports when
CSISEL = 0, set CSIM11 in the default status (00H).
To use P120/SO11/INTP0/EXLVI, P40/SCK11/RTCCL/RTCDIV, and P42/SSI11/PCL/INTP6 as general-
purpose ports when CSISEL = 1, set CSIM11 in the default status (00H).
To use P37/SO11, P35/SCK11, and P02/SSI11/INTP5 as general-purpose ports when CSISEL = 1, set
CSIM11 in the default status (00H).
4. Bit 0 (CSOT11) of CSIM11 and serial I/O shift register 11 (SIO11) are reset.
5. Do not rewrite TRMD11 when CSOT11 = 1 (during serial communication).
6. The SO11 output (refer to Figure 16-2) is fixed to the low level when TRMD11 is 0. Reception is started
when data is read from SIO11.
7. Do not rewrite SSE11 when CSOT11 = 1 (during serial communication).
8. Before setting this bit to 1, fix the SSI11 pin input level to 0 or 1.
9. Do not rewrite DIR11 when CSOT11 = 1 (during serial communication).
Remark The SSI11 pin is available only in 78K0/KA2-L (25, 32-pin products) and 78K0/KC2-L(48-pin products).