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P89V664FA512 Fiches technique(PDF) 63 Page - NXP Semiconductors |
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P89V664FA512 Fiches technique(HTML) 63 Page - NXP Semiconductors |
63 / 90 page P89V660_662_664 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 3.1 — 17 October 2011 63 of 90 NXP Semiconductors P89V660/662/664 80C51 with 512 B/1 kB/2 kB RAM, dual I2C-bus, SPI 6.10.4 Pulse width modulator mode All of the PCA modules can be used as PWM outputs (Figure 31). Output frequency depends on the source for the PCA timer. All of the modules will have the same frequency of output because they all share one and only PCA timer. The duty cycle of each module is independently variable using the module’s capture register CCAPnL. When the value of the PCA CL SFR is less than the Fig 30. PCA high-speed output mode 002aab917 toggle CEXn CF CR - CCF4 CCF3 CCF2 CCF1 CCF0 CCON (C0h) PCA interrupt - ECOMn 00 1 0 0 CAPPn CAPNn MATn TOGn PWMn ECCFn CCAPMn, n = 0 to 4 (C2h to C6h) 16-BIT COMPARATOR PCA timer/counter CH CL match (to CCFn) CCAPnH CCAPnL enable write to CCAPnH write to CCAPnL reset 01 Fig 31. PCA PWM mode 002aab918 - ECOMn 0 10 0 0 1 1 CAPPn CAPNn MATn TOGn PWMn ECCFn CCAPMn, n = 0 to 4 (C2h to C6h) CCAPnL 8-BIT COMPARATOR PCA timer/counter CCAPnH CL enable CEXn CL < CCAPnL CL ≥ CCAPnL 0 1 |
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