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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UPSD3422 데이터시트(PDF) 182 Page - STMicroelectronics |
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UPSD3422 데이터시트(HTML) 182 Page - STMicroelectronics |
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182 / 300 page  Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Programmable counter array (PCA) with PWM UPSD3422, UPSD3433, UPSD3434, UPSD3454 182/300 27.2 PCA clock selection ● The clock input to the 16-bit up counter in the PCA block is user-programmable. The three clock sources are: ● PCA Prescaler Clock (PCA0CLK, PCA1CLK) ● Timer 0 Overflow ● External Clock, Pin P4.3 or P4.7 The clock source is selected in the configuration register PCACON. The Prescaler output clock PCACLK is the fOSC divided by the divisor which is specified in the CCON2 or CCON3 register. When External Clock is selected, the maximum clock frequency should not exceed fOSC/4. Table 143. PCA0 and PCA1 registers SFR address Register name RW Register function PCA0 PCA1 PCA0 PCA1 A2 BA PCACL0 PCACL1 RW The low 8 bits of PCA 16-bit counter. A3 BB PCACH0 PCACH1 RW The high 8 bits of PCA 16-bit counter. A4 BC PCACON0 PCACON1 RW Control register – Enable PCA, Timer Overflow flag , PCA Idle Mode, and Select clock source. A5 A5 PCASTA N/A RW Status register, Interrupt Status flags – Common for both PCA Block 0 and 1. A9, AA, AB BD, BE, BF TCMMODE0 TCMMODE1 TCMMODE2 TCMMODE3 TCMMODE4 TCMMODE5 RW TCM Mode – Capture, Compare, and Toggle Enable Interrupts – PWM Mode Select. AC AD C1 C2 CAPCOML0 CAPCOMH0 CAPCOML3 CAPCOMH3 RW Capture/Compare registers of TCM0 AF B1 C3 C4 CAPCOML1 CAPCOMH1 CAPCOML4 CAPCOMH4 RW Capture/Compare registers of TCM1 B2 B3 C5 C6 CAPCOML2 CAPCOMH2 CAPCOML5 CAPCOMH5 RW Capture/Compare registers of TCM2 B4 C7 PWMF0 PWMF1 RW The 8-bit register to program the PWM frequency. This register is used for programmable, 8-bit PWM Mode only. FB FC CCON2 CCON3 RW Specify the pre-scaler value of PCA0 or PCA1 clock input Obsolete Product(s) - Obsolete Product(s) |
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