- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄67775 > M44C892 (ATMEL CORP) 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 PDF資料下載
參數(shù)資料
| 型號(hào)： | M44C892 |
| 廠商： | ATMEL CORP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | SSO-20 |
| 文件頁(yè)數(shù)： | 71/84頁(yè) |
| 文件大?。?/td> | 643K |
| 代理商： | M44C892 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)當(dāng)前第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)
M44C892
M44C892
M44C092
Rev. A5, 14-Dec-01
73 (84)
4.1.2
EEPROM
The EEPROM has a size of 512 bits and is organized as
32 x 16-bit matrix. To read and write data to and from the
EEPROM the serial interface must be used. The interface
supports one and two byte write accesses and one to
n-byte read accesses to the EEPROM.
EEPROM – Operating Modes
The operating modes of the EEPROM are defined via the
control byte. The control byte contains the row address,
the mode control bits and the read/not-write bit that is
used to control the direction of the following transfer. A
”0” defines a write access and a ”1” a read access. The
five address bits select one of the 32 rows of the EEPROM
memory to be accessed. For all accesses the complete
16-bit word of the selected row is loaded into a buffer. The
buffer must be read or overwritten via the serial interface.
The two mode control bits C1 and C2 define in which or-
der the accesses to the buffer are performed: High byte –
low byte or low byte – high byte. The EEPROM also sup-
ports autoincrement and autodecrement read operations.
After sending the start address with the corresponding
mode, consecutive memory cells can be read row by row
without transmission of the row addresses.
Two
special
control
bytes
enable
the
complete
initialization of EEPROM with ”0” or with ”1.
Write Operations
The EEPROM permits 8-bit and 16-bit write operations.
A write access starts with the START condition followed
by a write control byte and one or two data bytes from the
master. It is completed via the STOP condition from the
master after the acknowledge cycle.
The programming cycle consists of an erase cycle (write
”zeros”) and the write cycle (write ”ones”). Both cycles
together take about 10 ms.
Acknowledge Polling
If the EEPROM is busy with an internal write cycle, all
inputs
are disabled and the EEPROM will not
acknowledge until the write cycle is finished. This can be
used to detect the end of the write cycle. The master must
perform acknowledge polling by sending a start condition
followed by the control byte. If the device is still busy
with the write cycle, it will not return an acknowledge and
the master has to generate a stop condition or perform fur-
ther acknowledge polling sequences. If the cycle is
complete, it returns an acknowledge and the master can
proceed with the next read or write cycle.
Write One Data Byte
Start
Control byte
A
Data byte 1
A
Stop
Write Two Data Bytes
Start
Control byte
A
Data byte 1
A
Data byte 2
A
Stop
Write Control Byte Only
Start
Control byte
A
Stop
Write Control Bytes
MSB
LSB
Write low byte first
A4
A3
A2
A1
A0
C1
C0
R/NW
Row address
0
1
0
Byte order
LB(R)
HB(R)
MSB
LSB
Write high byte first
A4
A3
A2
A1
A0
C1
C0
R/NW
Row address
1
0
0
Byte order
HB(R)
LB(R)
A –> acknowledge; HB: high byte; LB: low byte; R: row address
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M44C092 | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
| M48T129Y-85PM1 | 0 TIMER(S), REAL TIME CLOCK, DMA32 |
| M48T129V-70PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T251Y-70PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T35Y-70PC6 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M44S05K4F1 | 功能描述:汽車(chē)連接器 MX44 Terminals RoHS:否 制造商:Amphenol SINE Systems 產(chǎn)品:Contacts 系列:ATP 位置數(shù)量: 型式:Female 安裝風(fēng)格: 端接類(lèi)型: 觸點(diǎn)電鍍:Nickel |
| M44T332538880MHZ | 制造商:MEC 功能描述: |
| M44T3338880MHZ | 制造商:MEC 功能描述: |
| M450 PSA2MCS100- | 制造商:TR FASTENINGS 功能描述:SCREW SLT PAN S/S A2 M4X50 制造商:TR FASTENINGS 功能描述:SCREW, SLT, PAN, S/S, A2, M4X50 制造商:TR FASTENINGS 功能描述:SCREW, SLT, PAN, S/S, A2, M4X50; Thread Size - Metric:M4; Screw Length:50mm; Fastener Material:Stainless Steel; Screw Head Style:Slotted Pan; SVHC:No SVHC (19-Dec-2012); Driver Type:Slotted; External Length / Height:50mm; ;RoHS Compliant: Yes |
| M450 PSSTMCZ100- | 制造商:TR FASTENINGS 功能描述:SCREW SLT PAN STEEL BZP M4X50 制造商:TR FASTENINGS 功能描述:SCREW, SLT, PAN, STEEL, BZP, M4X50 制造商:TR FASTENERS 功能描述:SCREW, SLT, PAN, STEEL, BZP, M4X50, Thread Size - Imperial:-, Thread Size - Metr |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。