SH7085 datasheet(22/1644 Pages) RENESAS

22 / 1644 page

Rev. 3.00 May 17, 2007 Page xxii of lviii

19.3.4 A/D Trigger Select Registers_0 and _1 (ADTSR_0 and ADTSR_1) ................... 956

19.4

Operation ........................................................................................................................... 962

19.4.1 Single Mode.......................................................................................................... 962

19.4.2 Continuous Scan Mode......................................................................................... 962

19.4.3 Single-Cycle Scan Mode ...................................................................................... 963

19.4.4 Input Sampling and A/D Conversion Time .......................................................... 963

19.4.5 A/D Converter Activation by MTU2 or MTU2S.................................................. 966

19.4.6 External Trigger Input Timing.............................................................................. 966

19.4.7 2-Channel Scanning.............................................................................................. 967

19.5

Interrupt Sources and DMAC and DTC Transfer Requests............................................... 968

19.6

Definitions of A/D Conversion Accuracy.......................................................................... 969

19.7

Usage Notes ....................................................................................................................... 972

19.7.1 Module Standby Mode Setting ............................................................................. 972

19.7.2 Permissible Signal Source Impedance .................................................................. 972

19.7.3 Influences on Absolute Accuracy ......................................................................... 972

19.7.4 Range of Analog Power Supply and Other Pin Settings....................................... 973

19.7.5 Notes on Board Design ......................................................................................... 973

19.7.6 Notes on Noise Countermeasures ......................................................................... 974

Section 20 Compare Match Timer (CMT) ........................................................ 975

20.1

Features.............................................................................................................................. 975

20.2

Register Descriptions ......................................................................................................... 976

20.2.1 Compare Match Timer Start Register (CMSTR) .................................................. 977

20.2.2 Compare Match Timer Control/Status Register (CMCSR) .................................. 977

20.2.3 Compare Match Counter (CMCNT) ..................................................................... 979

20.2.4 Compare Match Constant Register (CMCOR) ..................................................... 979

20.3

Operation ........................................................................................................................... 980

20.3.1 Interval Count Operation ...................................................................................... 980

20.3.2 CMCNT Count Timing......................................................................................... 980

20.4

Interrupts............................................................................................................................ 981

20.4.1 CMT Interrupt Sources and DTC Activation........................................................ 981

20.4.2 Timing of Setting Compare Match Flag ............................................................... 981

20.4.3 Timing of Clearing Compare Match Flag............................................................. 981

20.5

Usage Notes ....................................................................................................................... 982

20.5.1 Module Standby Mode Setting ............................................................................. 982

20.5.2 Conflict between Write and Compare-Match Processes of CMCNT ................... 982

20.5.3 Conflict between Word-Write and Count-Up Processes of CMCNT ................... 983

20.5.4 Conflict between Byte-Write and Count-Up Processes of CMCNT..................... 984

20.5.5 Compare Match between CMCNT and CMCOR ................................................. 984

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