32M-bit Serial Flash Memory with Dual and Quad SPI
(W25Q32)
The W25Q32BV (32 Mb) Serial Flash memory provides a storage solution for systems with limited space, pins and
power. The 25Q series offers flexibility and performance well beyond ordinary Serial Flash devices. They are ideal
for code shadowing to RAM, executing code directly from Dual/Quad SPI (XIP) and storing voice, text and data.
The device operates on a single 2.7V to 3.6V power supply with current consumption as low as 4 mA active and 1
uA for power-down.
The W25Q32BV array is organized into 16,384 programmable pages of 256 bytes each. Up to 256 bytes can be
programmed at a time. Pages can be erased in a group of 16 (4 KB sector erase), groups of 128 (32 KB block erase),
groups of 256 (64 KB block erase) or the entire chip (chip erase). The W25Q32BV has 1024 erasable sectors and 64
erase blocks respectively. The small 4 KB sectors allow for greater flexibility in applications that require data and
parameter storage.
The W25Q32BV supports the standard Serial Peripheral Interface (SPI), and a high performance Dual/Quad ouput
as well as Dual/Quad I/O SPI: Serial Clock, Chip Select, Serial Data I/O0 (DI), I/O1 (DO), I/O2 (WP), and I/O3
(/HOLD). SPI clock frequencies of up to 104 MHz are supported, providing equivalent clock rates of 208 MHz
(104 MHz x 2) for Dual I/O and 320 MHz (80 MHz x 4) for Quad I/O when using Fast Read Dual/Quad I/O
instructions. These transfer rates can outperform standard Asynchronous 8 and 16-bit Parallel Flash memories. The
Continous Read Mode allows for efficient memory access with as few as 8-clocks of instruction-overhead to read a
24-bit address, allowing true XIP (execute in place) operation.
USB to UART (FT232R)
The FT232R is a USB-to-serial-UART interface with the following advanced features:
•
Single chip USB to asynchronous serial data transfer interface
•
Entire USB protocol handled on the chip. No USB specific firmware programming required
•
Fully-integrated 1024 bit EEPROM storing device descriptors and CBUS I/O configuration
•
Fully-integrated USB termination resistors
•
Fully-integrated clock generation with no external crystal required, plus optional clock output selection ena-
bling a glue-less interface to external MCU or FPGA
•
Data transfer rates from 300 baud to 3 Mbaud (RS422, RS485, RS232) at TTL levels
•
128 byte receive buffer and 256 byte transmit buffer utilising buffer smoothing technology to allow for high-
data throughput
•
FTDI’s royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB
driver development in most cases.
•
Transmit and receive LED drive signals
32M-bit Serial Flash Memory with Dual and Quad SPI (W25Q32)
2–8
ADSP-CM419F EZ-KIT
®
Manual
