Datasheet

Section 19 Host Interface LPC Interface (LPC)
Rev. 3.00 Mar 21, 2006 page 578 of 788
REJ09B0300-0300
Unlike the IDR and ODR registers, the transfer direction is not fixed for the bidirectional data
registers (TWR). MWMF and SWMF are provided in STR to handle this situation. After writing
to TWR0, MWMF and SWMF must be used to confirm that the write authority for TWR1 to
TWR15 has been obtained.
Table 19.9 shows host address examples for LADR3 and registers, IDR3, ODR3, STR3,
TWR0MW, TWR0SW, and TWR1 to TWR15 when LADR3 = H'A24F and LADR3 = H'3FD0.
Table 19.9 Host Address Example
Register
Host Address when LADR3 =
H'A24F
Host Address when LADR3 =
H'3FD0
IDR3 H'A24A and H'A24E H'3FD0 and H'3FD4
ODR3 H'A24A H'3FD0
STR3 H'A24E H'3FD4
TWR0MW H'A250 H'3FC0
TWR0SW H'A250 H'3FC0
TWR1 H'A251 H'3FC1
TWR2 H'A252 H'3FC2
TWR3 H'A253 H'3FC3
TWR4 H'A254 H'3FC4
TWR5 H'A255 H'3FC5
TWR6 H'A256 H'3FC6
TWR7 H'A257 H'3FC7
TWR8 H'A258 H'3FC8
TWR9 H'A259 H'3FC9
TWR10 H'A25A H'3FCA
TWR11 H'A25B H'3FCB
TWR12 H'A25C H'3FCC
TWR13 H'A25D H'3FCD
TWR14 H'A25E H'3FCE
TWR15 H'A25F H'3FCF