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BCM20730 Datasheet(Fiches technique) 29 Page - Cypress Semiconductor

Numéro de pièce BCM20730
Description  Single-Chip Bluetooth Transceiver for Wireless Input Devices
Télécharger  62 Pages
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Fabricant  CYPRESS [Cypress Semiconductor]
Site Internet  http://www.cypress.com
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 29 page
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Power Management Unit
BROADCOM
September 9, 2013 • 20730-DS108-R
Page 28
®
BCM20730 Data Sheet
BROADCOM CONFIDENTIAL
• The PWM configuration register is shared among PWM1–4 (read/write). This 12-bit register is used:
– To configure each PWM channel.
– To select the clock of each PWM channel
– To change the phase of each PWM channel
Figure 8 shows the structure of one PWM channel.
Figure 8: PWM Channel Block Diagram
Power Management Unit
The Power Management Unit (PMU) provides power management features that can be invoked by software
through power management registers or packet-handling in the baseband core.
RF Power Management
The BBC generates power-down control signals for the transmit path, receive path, PLL, and power amplifier
to the 2.4 GHz transceiver, which then processes the power-down functions accordingly.
pwm_cfg_adr register
pwm#_init_val_adr register
pwm#_togg_val_adr register
pwm#_cntr_adr
cntr value is CM3 readable
10'H000
10'H3FF
10
10
10
Example: PWM cntr w/ pwm#_init_val = 0 (dashed line)
PWM cntr w/ pwm#_init_val = x (solid line)
10'Hx
pwm_out
pwm_togg_val_adr
pwm_out




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