SH7243 datasheet(10/1726 Pages) RENESAS

10 / 1726 page

Rev. 1.00 Jun. 26, 2008 Page x of xxx

3.3.1

Mode 0 (MCU Extension Mode 0) ..................................................................... 64

3.3.2

Mode 1 (MCU Extension Mode 1) ..................................................................... 64

3.3.3

Mode 2 (MCU Extension Mode 2) ..................................................................... 64

3.3.4

Mode 3 (Single Chip Mode) ............................................................................... 64

3.4

Address Map....................................................................................................................... 65

3.5

Initial State in This LSI.......................................................................................................72

3.6

Note on Changing Operating Mode.................................................................................... 72

Section 4 Clock Pulse Generator (CPG) ............................................................... 73

4.1

Features............................................................................................................................... 73

4.2

Input/Output Pins................................................................................................................ 77

4.3

Clock Operating Modes ...................................................................................................... 78

4.4

Register Descriptions.......................................................................................................... 81

4.4.1

Frequency Control Register (FRQCR) ............................................................... 81

4.4.2

MTU2S Clock Frequency Control Register (MCLKCR) ................................... 84

4.4.3

AD Clock Frequency Control Register (ACLKCR) ........................................... 85

4.4.4

Oscillation Stop Detection Control Register (OSCCR) ...................................... 86

4.5

Changing the Frequency ..................................................................................................... 87

4.6

Oscillator ............................................................................................................................ 88

4.6.1

Connecting Crystal Resonator ............................................................................ 88

4.6.2

External Clock Input Method.............................................................................. 89

4.7

Oscillation Stop Detection .................................................................................................. 90

4.8

USB Operating Clock (48 MHz) ........................................................................................ 91

4.8.1

Connecting a Ceramic Resonator........................................................................ 91

4.8.2

Input of an External 48-MHz Clock Signal ........................................................ 92

4.8.3

Handling of pins when a Ceramic Resonator is not Connected

(the Internal CPG is Selected or the USB is Not in Use) .................................... 93

4.9

Notes on Board Design ....................................................................................................... 94

4.9.1

Note on Using an External Crystal Resonator .................................................... 94

Section 5 Exception Handling ............................................................................... 95

5.1

Overview ............................................................................................................................ 95

5.1.1

Types of Exception Handling and Priority ......................................................... 95

5.1.2

Exception Handling Operations.......................................................................... 97

5.1.3

Exception Handling Vector Table ...................................................................... 99

5.2

Resets................................................................................................................................ 101

5.2.1

Types of Reset .................................................................................................. 101

5.2.2

Power-On Reset ................................................................................................ 102

5.2.3

Manual Reset .................................................................................................... 104

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