SH7764 Datasheet, PDF (799/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 19 Ethernet Controller (EtherC)
(1) Write to PHY interface
register
MMD = 0
MDC = 0
(2) Write to PHY interface
register
MMD = 0
MDC = 1
MDC
MDO
(1) (2)
(3)
Bus release timing
relationship
(3) Write to PHY interface
register
MMD = 0
MDC = 0
Figure 19.6 (2) Bus Release Flowchart (TA in Read in Figure 19.5)
(1) Write to PHY interface
register
MMD = 0
MDC = 1
(2) Read from PHY
interface register
MMD = 0
MMC = 1
MDI is read data
MDC
MDI
(1) (2) (3)
1-bit data read timing
relationship
(3) Write to PHY interface
register
MMD = 0
MDC = 0
Figure 19.6 (3) 1-Bit Data Read Flowchart
Rev. 1.00 Nov. 22, 2007 Page 743 of 1692
REJ09B0360-0100