HD64570 Datasheet, PDF (124/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

MPU write cycle
T1
T2
T3
T4
T5
CLK
WR
RTS
CLK
(c) CPU Mode 1, MPU Write Cycle
MPU write cycle
T1
T2
T3
T4
T5
T6
HDS, LDS
R/W
RTS
CLK
(d) CPU Mode 2, MPU Write Cycle
MPU write cycle
T1
T2
T3
T4
T5
HDS, LDS
R/W
RTS
(e) CPU Mode 3, MPU Write Cycle
Figure 5.1 Modem Control Signal Timing (cont)
Rev. 0, 07/98, page 108 of 453