SH7708 Datasheet, PDF (9/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

8.7.2 Canceling Hardware Standby Mode ..............................................................154
8.7.3 Hardware Standby Mode Timing..................................................................154
Section 9 On-Chip Oscillation Circuits............................................... 157
9.1 Overview............................................................................................................157
9.1.1 Features..................................................................................................157
9.2 Overview of the CPG ...........................................................................................158
9.2.1 CPG Block Diagram .................................................................................158
9.2.2 CPG Pin Configuration.............................................................................161
9.2.3 CPG Register Configuration ......................................................................161
9.3 Clock Operating Modes.........................................................................................162
9.4 Register Descriptions............................................................................................170
9.4.1 Frequency Control Register (FRQCR)..........................................................170
9.5 Changing the Frequency........................................................................................174
9.5.1 Changing the Multiplication Rate ...............................................................174
9.5.2 Changing the Division Ratio......................................................................174
9.6 PLL Standby Function..........................................................................................175
9.6.1 Overview of the PLL Standby Function........................................................175
9.6.2 Usage.....................................................................................................175
9.7 Controlling Clock Output .....................................................................................176
9.7.1 Clock Modes 0–2.....................................................................................176
9.7.2 Clock Modes 3 and 4 ................................................................................176
9.8 Overview of the Watchbog Timer (WDT) .................................................................177
9.8.1 Block Diagram of the WDT........................................................................177
9.8.2 Register Configurations.............................................................................177
9.9 WDT Registers....................................................................................................178
9.9.1 Watchdog Timer Counter (WTCNT) ............................................................178
9.9.2 Watchdog Timer Control/Status Register (WTCSR) .......................................178
9.9.3 Notes on Register Access...........................................................................180
9.10 Using the WDT .................................................................................................181
9.10.1 Canceling Standbys.................................................................................181
9.10.2 Changing the Frequency...........................................................................181
9.10.3 Using Watchdog Timer Mode....................................................................182
9.10.4 Using Interval Timer Mode.......................................................................182
9.10.5 Usage Notes ..........................................................................................183
9.11 Notes on Board Design........................................................................................184
Section 10 Bus State Controller (BSC) .............................................. 187
10.1 Overview..........................................................................................................187
10.1.1 Features................................................................................................187
10.1.2 Block Diagram .......................................................................................188
10.1.3 Pin Configuration...................................................................................190
10.1.4 Register Configuration ............................................................................192
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