Control Transfer; Figure 15.11 Control Transfer Stage Configuration - Hitachi H8S/2215 Series Hardware Manual

15.5.4

Control Transfer

The control transfer consists of three stages; setup, data (sometimes omitted), and status, as shown
in figure 15.11. The data stage consists of multiple bus transactions. Figures 15.12 to 15.16 show
operation flows in each stage.
Setup stage
Control-in
SETUP(0)
DATA0
Control-out SETUP(0)
DATA0
No data SETUP(0)
DATA0
Rev. 3.0, 10/02, page 492 of 686
IN(1)
DATA1
OUT(1)
DATA1

Figure 15.11 Control Transfer Stage Configuration

Data stage
IN(0) . . . IN(0/1)
DATA0 DATA0/1
OUT(0) . . . OUT(0/1)
DATA0 DATA0/1
Status stage
OUT(1)
DATA1
IN(1)
DATA1
IN(1)
DATA1