Serial Output Level Register M (Solm) - Renesas RL78/G1P Hardware User Manual

RL78/G1P

11.3.13 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.
Address: F0134H, F0135H (SOL0)
Symbol 15 14
SOL0 0 0
SOL
mn
0 Communication data is output as is.
1 Communication data is inverted and output.
Caution Be sure to clear bits 15 to 1 to "0".
Remark m: Unit number (m = 0), n: Channel number (n = 0)
Figure 11-16 shows examples in which the level of transmit data is reversed during UART transmission.
(a) Non-reverse Output (SOLmn = 0)
SOLm = 0 output
SOUT0n
(b) Reverse Output (SOLmn = 1)
SOLm = 1 output
SOUT0n
Remark m: Unit number (m = 0), n: Channel number (n = 0, 2)
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Figure 11-15. Format of Serial Output Level Register m (SOLm)
After reset: 0000H
13 12 11 10
0 0 0 0
Selects inversion of the level of the transmit data of channel n in UART mode
Figure 11-16. Examples of Reverse Transmit Data
ST
ST
CHAPTER 11 SERIAL ARRAY UNIT
R/W
9 8 7 6
0 0 0 0
Transmit data
Transmit data (inverted)
5 4 3 2
0 0 0 0
P S
P
1 0
0 SOL
00
S
331