LHF08CH1 查看數據表（PDF） - Sharp Electronics

零件编号

产品描述 (功能)

生产厂家

LHF08CH1

Flash Memory 8M (1MB × 8)

Sharp Electronics 

sharp

LHF08CH1

4

Individual block locking uses a combination of bits,

sixteen block lock-bits and a master lock-bit, to lock

and unlock blocks. Block lock-bits gate block erase

and byte write operations, while the master lock-bit

gates block lock-bit modification. Lock-bit

configuration operations (Set Block Lock-Bit, Set

Master Lock-Bit, and Clear Block Lock-Bits

commands) set and cleared lock-bits.

The status register indicates when the WSM’s block

erase, byte write, or lock-bit configuration operation is

finished.

The RY/BY# output gives an additional indicator of

WSM activity by providing both a hardware signal of

status (versus software polling) and status masking

(interrupt masking for background block erase, for

example). Status polling using RY/BY# minimizes

both CPU overhead and system power consumption.

When low, RY/BY# indicates that the WSM is

performing a block erase, byte write, or lock-bit

configuration. RY/BY#-high indicates that the WSM is

ready for a new command, block erase is suspended

(and byte write is inactive), byte write is suspended,

or the device is in deep power-down mode.

The access time is 85ns (tAVQV) over the commercial

temperature range (0°C to +70°C) and VCC supply

voltage range of 4.75V-5.25V. At lower VCC voltages,

the access times are 90ns (4.5V-5.5V), 120ns

(3.0V-3.6V) and 150ns (2.7V-3.6V).

The Automatic Power Savings (APS) feature

substantially reduces active current when the device

is in static mode (addresses not switching). In APS

mode, the typical ICCR current is 1 mA at 5V VCC.

When CE# and RP# pins are at VCC, the ICC CMOS

standby mode is enabled. When the RP# pin is at

GND, deep power-down mode is enabled which

minimizes power consumption and provides write

protection during reset. A reset time (tPHQV) is

required from RP# switching high until outputs are

valid. Likewise, the device has a wake time (tPHEL)

from RP#-high until writes to the CUI are recognized.

With RP# at GND, the WSM is reset and the status

register is cleared.

The device is available in 40-lead TSOP (Thin Small

Outline Package, 1.2 mm thick). Pinout is shown in

Figure 2.

Rev. 1.3

Share Link: