HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 158
HD6433640
Manufacturer Part Number
HD6433640
Description
H8/3644 Series Hardware Manual
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6433640.pdf
(508 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD6433640RA78H
Manufacturer:
HITACHI/日立
Quantity:
20 000
Part Number:
HD6433640RB90H
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 158 of 508
- Download datasheet (2Mb)
6.7.7
Prewrite-verify mode is a verify mode used to all bits to equalize their threshold voltages before
erasure.
To program all bits, write H'00 in accordance with the prewrite algorithm shown in figure 6.16.
Use this procedure to set all data in the flash memory to H'00 after programming. After the
necessary programming time has elapsed, exit program mode (by clearing the P bit to 0) and select
prewrite-verify mode (leave the P, E, PV, and EV bits all cleared to 0). In prewrite-verify mode, a
prewrite-verify voltage is applied to the memory cells at the read address. If the flash memory is
read in this state, the data at the read address will be read. After selecting prewrite-verify mode,
wait at least 4 s before reading.
Note: For a sample prewriting program, see the prewrite subroutine in the sample erasing
6.7.8
There are two modes for flash memory program/erase protection: hardware protection and
software protection. These two protection modes are described below.
Software Protection: With software protection, setting the P or E bit in the flash memory control
register (FLMCR) does not cause a transition to program mode or erase mode.
Details of software protection are given below.
Item
Block
protect
Note: * Three modes: program-verify, erase-verify, and prewrite-verify.
program.
Prewrite-Verify Mode
Protect Modes
Description
Programming and erase protection can be
set for individual blocks by settings in the
erase block registers (EBR1 and EBR2).
Setting EBR1 to H'F0 and EBR2 to H'00
places all blocks in the program/erase-
protected state.
Program
Disabled
Erase
Disabled
Functions
Verify*
Enabled
149
Related parts for HD6433640
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
LOW FREQUENCY POWER AMPLIFIER
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON N-CHANNEL JUNCTION FET LOW FREQUECY LOW NOISE AMPLIFIER
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON SPEED POWER SWITCHING
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET HIGH SPEED POWER SWITCHING
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet: