HD64F2168 Datasheet, PDF (615/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Start
Host write
No
H'D1 command
received?
Yes
Wait for next byte
Host write
No
Data byte?
Yes
Write bit 1 of data byte
to DR bit of PD3/GA20
Figure 16.8 GA20 Output
Rev. 3.00, 03/04, page 575 of 830