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| 型號(hào)： | M38049FFLWG |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PBGA64 |
| 封裝： | 6 X 6 MM, 0.65 MM PITCH, PLASTIC, LGA-64 |
| 文件頁(yè)數(shù)： | 112/129頁(yè) |
| 文件大?。?/td> | 1721K |
| 代理商： | M38049FFLWG |
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Rev.1.00
Oct 27, 2008
Page 83 of 128
REJ03B0266-0100
3804 Group (Spec.L)
FLASH MEMORY MODE
The 3804 group (Spec.L)’s flash memory version has the flash
memory that can be rewritten with a single power source.
For this flash memory, three flash memory modes are available
in which to read, program, and erase: the parallel I/O and
standard serial I/O modes in which the flash memory can be
manipulated using a programmer and the CPU rewrite mode in
which the flash memory can be manipulated by the Central
Processing Unit (CPU).
This flash memory version has some blocks on the flash memory
as shown in Figure 81 and each block can be erased.
In addition to the ordinary User ROM area to store the MCU
operation control program, the flash memory has a Boot ROM
area that is used to store a program to control rewriting in CPU
rewrite and standard serial I/O modes. This Boot ROM area has
had a standard serial I/O mode control program stored in it when
shipped from the factory. However, the user can write a rewrite
control program in this area that suits the user’s application
system. This Boot ROM area can be rewritten in only parallel I/O
mode.
Summary
Table 15 lists the summary of the 3804 group (Spec.L) flash
memory version.
NOTE:
1. The Boot ROM area has had a standard serial I/O mode control program stored in it when shipped from the factory.
This Boot ROM area can be erased and written in only parallel I/O mode.
NOTES:
1. VCC = AVCC = 2.7 V to 5.5 V, Topr = 0
°C to 60 °C, unless otherwise noted.
2. Definition of programming/erase count
The programming/erase count refers to the number of erase operations per block. For example, if block A is a 2 K-byte block and
2,048 1-byte writes are performed, all to different addresses, after which block A is erased, the programming/erase count is 1. Note
that for each erase operation it is not possible to perform more than one programming (write) operation to the same address
(overwrites prohibited).
3. This is the number of times for which all electrical characteristics are guaranteed after a programming or erase operation. (The
guarantee covers the range from 1 to maximum value.)
4. On systems where reprogramming is performed a large number of times, it is possible to reduce the effective number of overwrites
by sequentially shifting the write address, so that as much of the available area of the block is used up through successive
programming (write) operations before an erase operation is performed. For example, if each programming operation uses 16 bytes
of space, a maximum of 128 programming operations may be performed before it becomes necessary to erase the block in order to
continue. In this way the effective number of overwrites can be kept low. The effective overwrite count can be further reduced by
evenly dividing operations between block A and block B. It is recommended that data be retained on the number of times each
block has been erased and a limit count set.
5. If a block erase error occurs, execute the clear status register command followed by the block erase command a minimum of three
times and until the erase error is no longer generated.
Table 15 Summary of 3804 group (Spec.L)’s flash memory version
Item
Specifications
Power source voltage (VCC)VCC = 2.7 to 5.5 V
Program/Erase VPP voltage (VPP)VCC = 2.7 to 5.5 V
Flash memory mode
3 modes; Parallel I/O mode, Standard serial I/O mode, CPU
rewrite mode
Erase block division
User ROM area/Data ROM area
Refer to Figure 81.
Boot ROM area (1)
Not divided (4 Kbytes)
Program method
In units of bytes
Erase method
Block erase
Program/Erase control method
Program/Erase control by software command
Number of commands
5 commands
Number of program/Erase times
100(Max.)
ROM code protection
Available in parallel I/O mode and standard serial I/O mode
Table 16 Electrical characteristics of flash memory (program ROM)
Symbol
Parameter
Test conditions
Limits
Unit
Min.
Typ.
Max.
Byte programming time
VCC = 5.0 V, Topr = 25
°C
60
400
μs
Block erase time
(Block 1)
VCC = 5.0 V, Topr = 25
°C
0.5
9
s
(Block 2)
0.9
9
s
(Block 3)
1.3
9
s
(Block A, B)
0.3
9
s
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38049RLSS | 功能描述:DEV EMULATOR CHIP RAM 2KB 64SDIP RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 內(nèi)電路編程器、仿真器以及調(diào)試器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 19/Jul/2010 標(biāo)準(zhǔn)包裝:1 系列:* 類(lèi)型:* 適用于相關(guān)產(chǎn)品:* 所含物品:* |
| M3806 | 功能描述:電纜固定件和配件 LTSCG 625 BLACK RoHS:否 制造商:Heyco 類(lèi)型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強(qiáng)度: |
| M3806 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 1000' |
| M3806 BK002 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 500' |
| M3806 BK005 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 100' |
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