- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370461 > HD407L4818 (Hitachi,Ltd.) 4-Bit Single-Chip Microcomputer(4位單片微計算機) PDF資料下載
參數(shù)資料
| 型號： | HD407L4818 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| 中文描述： | 4位單片機（4位單片微計算機） |
| 文件頁數(shù)： | 70/98頁 |
| 文件大?。?/td> | 621K |
| 代理商： | HD407L4818 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁當前第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁
HD404818 Series
70
Programmable ROM Operation
The MCU on-chip PROM is programmed in PROM mode. PROM mode is set by pulling
TEST
,
M
0
, and
M
1
low, and RESET high, as shown in figure 38. In PROM mode, the MCU does not operate. It can be
programmed like a standard 27256 EPROM using a standard PROM programmer and an 80-to-28-pin
socket adapter. Table 31 lists the recommended PROM programmers and socket adapters.
Since an instruction of the HMCS400 series consists of 10 bits, the HMCS400 series microcomputer
incorporates a conversion circuit to enable the use of a general-purpose PROM programmer. By this circuit,
an instruction is read or programmed using two addresses, a lower 5 bits and upper 5 bits. For example, if 8
kwords of on-chip PROM are programmed by a general-purpose PROM pro-grammer, 16 kbytes of
addresses ($0000–$3FFF) should be specified.
Programming and Verification
The MCU can be programmed at high speed without causing voltage stress or affecting data reliability.
Table 30 shows how programming and verification modes are selected.
Precautions
1. Addresses $0000 to $3FFF must be specified if the PROM is programmed by a PROM programmer. If
addresses of $4000 or higher are accessed, the PROM may not be programmed or verified. Note that
plastic package types cannot be erased and reprogrammed. Data in unused addresses must be set to $FF.
2. Ensure that the PROM programmer, socket adapter, and LSI match. Using the wrong programmer for
the socket adapter may cause an overvoltage and damage the LSI. Make sure that the LSI is firmly fixed
in the socket adapter, and that the socket adapter is firmly fixed onto the programmer.
3. The PROM should be programmed with V
PP
= 12.5 V. Other PROMs use 21 V. If 21 V is applied to the
MCU, the LSI may be permanently damaged. 12.5 V is the Intel 27256 setting.
Table 30 PROM Mode Selection
Pin
CE
Mode
OE
V
PP
V
PP
V
PP
V
PP
O
0
–O
7
Data input
Programming
Low
High
Verify
High
Low
Data output
Programming inhibited
High
High
High impedance
相關PDF資料 |
PDF描述 |
|---|---|
| HD40L4812 | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| HD40L4816 | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| HD40L4818 | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| HD404816 | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| HD404814FS | 16-digit LCD driver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HD407L4818FS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD407L4818H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD407L4818TF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD4081 | 制造商:Panasonic Industrial Company 功能描述:I.C. |
| HD40A4052H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory |
發(fā)布緊急采購，3分鐘左右您將得到回復。