SH7670 Datasheet, PDF (639/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 16 Serial Sound Interface (SSI)
16.4.3 Operation Modes
There are three modes of operation: configuration, enabled and disabled. Figure 16.19 shows how
the module enters each of these modes.
Reset
Module
configuration
(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 16.19 Operation Modes
(1) Configuration Mode
This mode is entered after the module is released from reset. All required configuration fields 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 module to enter the module enabled mode.
(2) Module Enabled Mode
Operation of the module in this mode is dependent on the operation mode selected. For details,
refer to section 16.4.4, Transmit Operation and section 16.4.5, Receive Operation, below.
Rev. 1.00 Nov. 14, 2007 Page 613 of 1262
REJ09B0437-0100