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ST6215 Datasheet(PDF) 47 Page - STMicroelectronics |
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ST6215 Datasheet(HTML) 47 Page - STMicroelectronics |
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47 / 105 page  ST6215C/ST6225C 47/105 9.2 8-BIT TIMER 9.2.1 Introduction The 8-Bit Timer on-chip peripheral is a free run- ning downcounter based on an 8-bit downcounter with a 7-bit programmable prescaler, giving a max- imum count of 215. The peripheral may be config- ured in three different operating modes. 9.2.2 Main Features s Time-out downcounting mode with up to 15-bit accuracy s External counter clock source (valid also in STOP mode) s Interrupt capability on counter underflow s Output signal generation s External pulse length measurement s Event counter The timer can be used in WAIT and STOP modes to wake up the MCU. Figure 27. Timer Block Diagram INTERRUPT TMZ ETI TOUT DOUT PSI PS2 PS1 PS0 TSCR PROGRAMMABLE PRESCALER PSCR6 PSCR5 PSCR4 PSCR3 PSCR2 PSCR1 PSCR0 PSCR REGISTER 0 70 TCR7 TCR6 TCR5 TCR4 TCR3 TCR2 TCR1 TCR0 TCR 70 8-BIT DOWN COUNTER TIMER fPRESCALER fCOUNTER fEXT fINT/12 LATCH PIN PSCR7 7 /2 /1 /4 /8 /16 /32 /64 /128 REGISTER REGISTER 1 |
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