- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376431 > UPD75P048CW (NEC Corp.) 4-BIT SINGLE-CHIP MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | UPD75P048CW |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 15/40頁 |
| 文件大小： | 320K |
| 代理商： | UPD75P048CW |
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頁當前第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
15
μ
PD75P048
3.2 PROM WRITE PROCEDURE
PROMs can be written at high speed using the following procedure: (see the following figure)
(1) Pull unused pins to V
SS
through resistors. Set the X1 pin low.
(2) Supply 5 volts to the V
DD
and V
PP
pins.
(3) Wait for 10
μ
s.
(4) Select the zero clear program memory address mode.
(5) Supply 6 volts to the V
DD
and 12.5 volts to the V
PP
pins.
(6) Select the program inhibit mode.
(7) Write data in the 1 ms write mode.
(8) Select the program inhibit mode.
(9) Select the verify mode. If the data is correct, proceed to step (10). If not, repeat steps (7), (8) and (9).
(10) Perform one additional write (duration of 1 ms
×
number of writes at (7) to (9)).
(11) Select the program inhibit mode.
(12) Apply four pulses to the X1 pin to increment the program memory address by one.
(13) Repeat steps (7) to (12) until the end address is reached.
(14) Select the zero clear program memory address mode.
(15) Return the V
DD
and V
PP
pins back to + 5 volts.
(16) Turn off the power.
The following figure shows steps (2) to (12).
MD0
(P30)
V
PP
V
PP
V
DD
V
DD
+1
V
DD
V
DD
X1
Input data
Output
data
Input data
P40-P43
P50-P53
MD1
(P31)
MD2
(P32)
MD3
(P33)
Write
Verify
Additional write
Address
increment
X repetition
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD750004CU(A)-XXX | 4-Bit Microcontroller |
| UPD750004CU-XXX | 4-Bit Microcontroller |
| UPD750004GB(A)-XXX-3BS | 4-Bit Microcontroller |
| UPD750004GB-XXX3B4 | 4-Bit Microcontroller |
| UPD750004GB-XXX-3BS | 4-Bit Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD75P3018AGC-8BT-A | 制造商:Renesas Electronics Corporation 功能描述:MCU 4BIT 75XL CISC 32KB EPROM 2.5V/3.3V/5V 80PQFP - Trays 制造商:Renesas Electronics 功能描述:75XL 6MHz Cut Tape 制造商:Renesas 功能描述:MCU 4-bit 75XL CISC 32KB EPROM 2.5V/3.3V/5V 80-Pin PQFP |
| UPD75P3018AGK-BE9 | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD75P3036GC-3B9-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD75P308GF-3B9 | 制造商:Renesas Electronics Corporation 功能描述:MCU 4-Bit 75XL CISC 8064Byte PROM 5V 80-Pin PQFP |
| UPD75P308GF-3BA | 制造商:Renesas Electronics Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。