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BCM20730A1KML2G Fiches technique(PDF) 28 Page - Cypress Semiconductor

No de pièce BCM20730A1KML2G
Description  Single-Chip Bluetooth Transceiver for Wireless Input Devices
Download  62 Pages
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Fabricant  CYPRESS [Cypress Semiconductor]
Site Internet  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

BCM20730A1KML2G Fiches technique(HTML) 28 Page - Cypress Semiconductor

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GPIO Port
BROADCOM
September 9, 2013 • 20730-DS108-R
Page 27
®
BCM20730 Data Sheet
BROADCOM CONFIDENTIAL
GPIO Port
The BCM20730 has 14 general-purpose I/Os (GPIOs) in the 32-pin package, 22 GPIOs in the 40-pin package, and
40 GPIOs in the 64-pin package. All GPIOs support programmable pull-up and pull-down resistors, and all
support a 2 mA drive strength except P26, P27, P28, and P29, which provide a 16 mA drive strength at 3.3V
supply.
Port 0–Port 1, Port 8–Port 23, and Port 28–Port 38
All of these pins can be programmed as ADC inputs.
Port 26–Port 29
P[26:29] consists of four pins. All pins are capable of sinking up to 16 mA for LED. These pins also have the PWM
function, which can be used for LED dimming.
PWM
The BCM20730 has four internal PWM channels. The PWM module consists of the following:
•PWM1–4
• Each of the four PWM channels, PWM1–4, contains the following registers:
– 10-bit initial value register (read/write)
– 10-bit toggle register (read/write)
– 10-bit PWM counter value register (read)
Table 6: XTAL Oscillator Characteristics
Parameter
Symbol
Conditions
Minimum
Typical
Maximum
Unit
Output
frequency
Foscout
32.768
kHz
Frequency
tolerance
Crystal dependent –
100
ppm
Start-up time
Tstartup
––
500
ms
XTAL drive level Pdrv
For crystal
selection
0.5
μW
XTAL series
resistance
Rseries
For crystal
selection
––
70
k
Ω
XTAL shunt
capacitance
Cshunt
For crystal
selection
––
1.3
pF


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