434CHAPTER 19 SERIAL INTERFACE CHANNEL 219.2 Serial Interface Channel 2 ConfigurationSerial interface channel 2 consists of the following hardware.Table 19-1. Serial Interface Channel 2 ConfigurationItem ConfigurationRegister Transmit shift register (TXS)Receive shift register (RXS)Receive buffer register (RXB)Control register Serial operating mode register 2 (CSIM2)Asynchronous serial interface mode register (ASIM)Asynchronous serial interface status register (ASIS)Baud rate generator control register (BRGC)Port Mode Register 7 (PM7)NoteNote See Figure 6-15 P70 Block Diagram and Figure 6-16 P71 and P72 Block Diagram.