SH7785 Datasheet, PDF (1357/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

26. Serial Sound Interface (SSI) Module
26.4.4 Operation Modes
There are three modes of operation: configuration, enabled and disabled. Figure 26.20 shows the
transition diagram between these operation modes.
Power-on reset
Manual reset
Module
configration
(after reset)
EN = 0
(IDST = 1)
EN = 1
(IDST = 0)
Module
disabled
(waiting until
bus inactive)
EN = 0
(IDST = 0)
Module
enabled
(normal tx/rx)
Figure 26.20 Transition Diagram between Operation Modes
(1) Configuration Mode
This mode is entered after the module is released from reset. All required settings in the control
register should be defined in this mode, before the SSI module is enabled by setting the EN bit.
Setting the EN bit causes the SSI module to enter the module enabled mode.
(2) Module Enabled Mode:
Operation of the module in this mode depends on the selected operating mode. For details, see
section 26.4.5, Transmit Operation and section 26.4.6, Receive Operation.
Rev.1.00 Jan. 10, 2008 Page 1327 of 1658
REJ09B0261-0100