CHAPTER 14 SERIAL ARRAY UNIT
Page 348 of 920
14.3.13 Serial output level register m (SOLm)
The SOLm register is a register that is used to set inversion of the data output level of each channel.
This register can be set only in the UART mode. Be sure to set 0 for corresponding bit in the CSI mode.
Inverting channel n by using this register is reflected on pin output only when serial output is enabled (SOEmn =
1). When serial output is disabled (SOEmn = 0), the value of the SOmn bit is output as is.
Rewriting the SOLm register is prohibited when the register is in operation (when SEmn = 1).
The SOLm register can be set by a 16-bit memory manipulation instruction.
The lower 8 bits of the SOLm register can be set with an 8-bit memory manipulation instruction with SOLmL.
Reset signal generation clears the SOLm register to 0000H.
Figure 14 - 19 Format of Serial output level register m (SOLm)
Caution
Be sure to clear bits 15 to 3, 1, and 0 of the SOL0 register, and bits 15 to 3, and 1 of the SOL1 register
to “0”.
Figure 14 - 20 shows examples in which the level of transmit data is reversed during UART transmission.
Address: F0134H, F0135H (SOL0)
After reset: 0000H
Symbol
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SOL
02
0
0
Address: F0174H, F0175H (SOL1)
After reset: 0000H
Symbol
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SOL
12
0
SOL
10
SOL
mn
Selects inversion of the level of the transmit data of channel n in UART mode
0
Communication data is output as is.
1
Communication data is inverted and output.
<R>
Summary of Contents for RL78/G1H
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