GD25Q21 Datasheet, PDF (5/49 Pages) ELM Electronics – Uniform Sector Dual and Quad Serial Flash

GD25Q21BxIGx Uniform Sector Dual and Quad Serial Flash
2. GENERAL DESCRIPTION
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The GD25Q21B Serial flash supports the standard Serial Peripheral Interface (SPI), and a high performance
Dual/Quad output as well as Dual/Quad SPI: Serial Clock, Chip Select, Serial Data I/O0 (SI), I/O1 (SO), I/O2
(WP#), and I/O3 (HOLD#). SPI clock frequencies of up to 104MHz are supported allowing equivalent clock
rates of 208MHz for Dual Output & Dual I/O read command, and 416MHz for Quad output & Quad I/O read
command.
Connection Diagram
8-LEAD SOP
Pin Description
Pin Name
I/O
CS#
I
SO (IO1)
I/O
WP# (IO2)
I/O
VSS
SI (IO0)
I/O
SCLK
I
HOLD# (IO3)
I/O
VCC
8-LEAD USON
Description
Chip Select Input
Data Output ( Data Input Output 1 )
Write Protect Input (Data Input Output 2)
Ground
Data Input ( Data Input Output 0 )
Serial Clock Input
Hold Input (Data Input Output 3)
Power Supply
Block Diagram
WP#(IO2)
Write Control
Logic
HOLD#(IO3)
SCLK
CS#
SI(IO0)
SO(IO1)
SPI
Command &
Control Logic
Status
Register
High Voltage
Generators
Flash
Memory
Page Address
Latch/Counter
Column Decode And
256-Byte Page Buffer
Byte Address
Latch/Counter
49 - 5
Rev.1.1