A25L016 Series
Pin Descriptions
Pin No.
Logic Symbol
Description
VCC
C
Serial Clock
Serial Data Input 1
Serial Data Output 2
DIO
DO
DIO
C
DO
Chip Select
S
S
A25L016
Write Protect
Hold
W
W
HOLD
HOLD
VCC
Supply Voltage
Ground
VSS
VSS
Notes:
1. The DIO is also used as an output pin when the Fast
Read Dual Output instruction and the Fast Read Dual
Input-Output instruction are executed.
2. The DO is also used as an input pin when the Fast
Read Dual Input-Output instruction.
SIGNAL DESCRIPTION
Serial Data Output (DO). This output signal is used to
transfer data serially out of the device. Data is shifted out on
the falling edge of Serial Clock (C).
The DO pin is also used as an input pin when the Fast Read
Dual Input-Output instruction and Dual Input Fast Program is
executed.
Serial Data Input (DIO). This input signal is used to transfer
data serially into the device. It receives instructions,
addresses, and the data to be programmed. Values are
latched on the rising edge of Serial Clock (C).
Status Register cycle is in progress, the device will be in the
Standby mode (this is not the Deep Power-down mode).
Driving Chip Select ( ) Low enables the device, placing it in
S
the active power mode.
After Power-up, a falling edge on Chip Select ( ) is required
S
prior to the start of any instruction.
Hold (
). The Hold (
) signal is used to pause
HOLD
HOLD
any serial communications with the device without
deselecting the device.
The DIO pin is also used as an output pin when the Fast
Read Dual Output instruction and the Fast Read Dual
Input-Output instruction are executed.
Serial Clock (C). This input signal provides the timing of the
serial interface. Instructions, addresses, or data present at
Serial Data Input (DIO) are latched on the rising edge of
Serial Clock (C). Data on Serial Data Output (DO) changes
after the falling edge of Serial Clock (C).
During the Hold condition, the Serial Data Output (DO) is
high impedance, and Serial Data Input (DIO) and Serial
Clock (C) are Don’t Care. To start the Hold condition, the
device must be selected, with Chip Select ( ) driven Low.
S
Write Protect ( ). The main purpose of this input signal is
W
to freeze the size of the area of memory that is protected
against program or erase instructions (as specified by the
values in the BP2, BP1, and BP0 bits of the Status Register).
Chip Select ( ). When this input signal is High, the device
S
is deselected and Serial Data Output (DO) is at high
impedance. Unless an internal Program, Erase or Write
(March, 2012, Version 2.0)
3
AMIC Technology Corp.
AMICC [ AMIC TECHNOLOGY ]
