Operation Of Serial Pin Multiplexed Modes - Renesas H8S Family Hardware Manual

Operation of Serial Pin Multiplexed Modes

Serial Pin Multiplexed Mode 0

(Default; SMR0 Register [bits SM2, SM1, SM0] = [0 0 0])

This mode is the default configuration and each COM port is used for its respective serial

communication module: COM1 works with SCIF, COM2 with SCI_1, and COM3 with SCI_3.

DCD, RI, DSR, DTR, CTS, RTS, RxDF, and TxDF of SCIF are connected to the corresponding

pins of COM1. Tx/Rx of COM1 are tied across to RxDF/TxDF (cross connection).

RxD1 and TxD1 of SCI_1 are cross-connected to COM2. RxD3 and TxD3 of SCI_3 are cross-

connected to COM3.

Figure 16.1 illustrates the pin connection in serial pin multiplexed mode 0.

Figure 16.1 Serial Pin Multiplexed Mode 0

Section 16 Serial Pin Multiplexed Modes

Rev. 1.00 Mar. 12, 2008 Page 545 of 1178

REJ09B0403-0100