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TTP259-ASFN Datasheet(PDF) 72 Page - Tontek Design Technology |
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TTP259-ASFN Datasheet(HTML) 72 Page - Tontek Design Technology |
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72 / 81 page  Preliminary TTP259 TonTouch TM 2015/05/25 Page 72 of 81 Ver: 1.1 Duty counter value= TPCT2*256 +TPCT1*16+TPCT0 When user writes data to the TPCT2~TPCT0, the data just keep in TPCT2~TPCT0 latch register. When TPCHS0 is writing, the TPCT2~TPCT0 latch register’s complement value will load into TPCT2~TPCT0 duty counter as initial value and start the scan function. The duty counter will be enabled by writing the TPCHS0 register and will set the TPCTF flag if duty counter overflow. As writing the TPCHS0 register will reload the 12-bit duty counter and clear the TPCTF and TPCMPF. MCKS[21AH]: Modulation clock selector register [R/W], default value [0111] Register Bit3 Bit2 Bit1 Bit0 Bit Name - MCKS2 MCKS1 MCKS0 Read/Write - R/W R/W R/W MCKS2~MCKS0: Modulation clock selector. The TPCMPF will be set as no modulation clock going into duty counter with de-bounce feature and will also call the interrupt as TPCMPIE=1. TPCHS0[210H]: Touch pad channel selector register0 [R/W], default value [0000] Register Bit3 Bit2 Bit1 Bit0 Bit Name TPEN3 TPEN2 TPEN1 TPEN0 Read/Write R/W R/W R/W R/W TPEN3~TPEN0: Touch pad channel selector 1st nibble. TPCHS1[211H]: Touch pad channel selector register1 [R/W], default value [0000] Register Bit3 Bit2 Bit1 Bit0 Bit Name TPEN7 TPEN6 TPEN5 TPEN4 Read/Write R/W R/W R/W R/W TPEN7~TPEN4: Touch pad channel selector 2nd nibble. MCKS2~MCKS0 Sample time MCKS2~MCKS0 Sample time 000 OSCH/1 100 OSCH/16 001 OSCH/2 101 OSCH/32 010 OSCH/4 110 OSCH/64 011 OSCH/8 111 OSCL |
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