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CY8C4128FNI-BL473 Datasheet(Fiches technique) 6 Page - Cypress Semiconductor

Numéro de pièce CY8C4128FNI-BL473
Description  Programmable System-on-Chip
Télécharger  47 Pages
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Fabricant  CYPRESS [Cypress Semiconductor]
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PSoC® 4: PSoC 4XX8_BLE
Family Datasheet
Document Number: 001-94624 Rev. *K
Page 6 of 47
Figure 3. PSoC 4XX8_BLE MCU Clocking Architecture
The HFCLK signal can be divided down (see Figure 3) to
generate synchronous clocks for the UDBs, and the analog and
digital peripherals. There are a total of 12 clock dividers for
PSoC 4XX8_BLE: ten with 16-bit divide capability and two with
16.5-bit divide capability. This allows the generation of 16 divided
clock signals, which can be used by peripheral blocks. The
analog clock leads the digital clocks to allow analog events to
occur before the digital clock-related noise is generated. The
16-bit and 16.5-bit dividers allow a lot of flexibility in generating
fine-grained frequency values and are fully supported in PSoC
PSoC 4XX8_BLE device can be reset from a variety of sources
including a software reset. Reset events are asynchronous and
guarantee reversion to a known state. The reset cause is
recorded in a register, which is sticky through resets and allows
the software to determine the cause of the reset. An XRES pin
is reserved for an external reset to avoid complications with the
configuration and multiple pin functions during power-on or
reconfiguration. The XRES pin has an internal pull-up resistor
that is always enabled.
Voltage Reference
The PSoC 4XX8_BLE reference system generates all internally
required references. A one-percent voltage reference spec is
provided for the 12-bit ADC. To allow better signal-to-noise ratios
(SNR) and better absolute accuracy, it is possible to bypass the
internal reference using a GPIO pin or use an external reference
for the SAR. Refer to Table 19, “SAR ADC AC Specifications,”
on page 26 for details.
BLE Radio and Subsystem
PSoC 4XX8_BLE incorporates a Bluetooth Smart subsystem
that contains the Physical Layer (PHY) and Link Layer (LL)
engines with an embedded AES-128 security engine. The
physical layer consists of the digital PHY and the RF transceiver
that transmits and receives GFSK packets at 1 Mbps over a
2.4-GHz ISM band, which is compliant with Bluetooth Smart
Bluetooth Specification 4.2. The baseband controller is a
composite hardware and firmware implementation that supports
both master and slave modes. Key protocol elements, such as
HCI and link control, are implemented in firmware. Time-critical
functional blocks, such as encryption, CRC, data whitening, and
access code correlation, are implemented in hardware (in the LL
The RF transceiver contains an integrated balun, which provides
a single-ended RF port pin to drive a 50-Ω antenna via a
matching/filtering network. In the receive direction, this block
converts the RF signal from the antenna to a digital bit stream
after performing GFSK demodulation. In the transmit direction,
this block performs GFSK modulation and then converts a digital
baseband signal to a radio frequency before transmitting it to air
through the antenna.
The Bluetooth Smart Radio and Subsystem (BLESS) requires a
1.9-V minimum supply (the range varies from 1.9 V to 5.5 V).
Key features of BLESS are as follows:
Master and slave single-mode protocol stack with logical link
control and adaptation protocol (L2CAP), attribute (ATT), and
security manager (SM) protocols
API access to generic attribute profile (GATT), generic access
profile (GAP), and L2CAP
L2CAP connection-oriented channel (Bluetooth 4.1 feature)
GAP features
Broadcaster, Observer, Peripheral, and Central roles
Security mode 1: Level 1, 2, 3, and 4
Security mode 2: Level 1 and 2
User-defined advertising data
Multiple bond support
GATT features
GATT client and server
Supports GATT sub-procedures
32-bit universally unique identifier (UUID) (Bluetooth 4.1
Security Manager (SM)
Pairing methods: Just works, Passkey Entry, Out of Band,
and Numeric Comparison
Authenticated man-in-the-middle (MITM) protection and data
Link Layer (LL)
Master and Slave roles
128-bit AES engine
Low-duty cycle advertising (Bluetooth 4.1 feature)
LE Ping (Bluetooth 4.1 feature)
LE Data Packet Length Extension
Link Layer Privacy (with extended scanning filter policy)
LE Secure Connections
Supports all SIG-adopted BLE profiles
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