- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367732 > P87C055 (NXP Semiconductors N.V.) Microcontrollers for TV and video MTV PDF資料下載
參數(shù)資料
| 型號： | P87C055 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Microcontrollers for TV and video MTV |
| 中文描述： | 電視和視頻微控制器MTV |
| 文件頁數(shù)： | 27/40頁 |
| 文件大?。?/td> | 243K |
| 代理商： | P87C055 |
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頁當(dāng)前第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
1996 Mar 22
27
Philips Semiconductors
Product specification
Microcontrollers for TV and video (MTV)
83C145; 83C845
83C055; 87C055
14.2
Programming operation
Figures 10 and 11 show the timing diagrams for the
Program/Verify cycle. Programming operation:
1.
RST should initially be held HIGH for at least
2 machine cycles. P0.1 (PROG) and P0.0 (V
PP
) will be
at V
OH
as a result of the RST operation. At this point,
these pins function as normal quasi-bidirectional I/O
ports and the programming equipment may pull these
lines LOW. However, prior to sending the 10-bit code
on the RST pin, the programming equipment should
drive these pins HIGH (V
IH
).
2.
The RST pin may now be used as the serial data input
for the data stream which places the 87C055 in the
Programming Mode. Data bits are sampled during the
clock HIGH time and thus should only change during
the time that the clock is LOW. Following transmission
of the last data bit, the RST pin should be held LOW.
3.
Next the address information for the location to be
programmed is placed on Port 2 and ASEL is used to
perform the address multiplexing, as previously
described (see Table 31; note 1).
a) At this time, Port 1 functions as an output.
b) A high voltage V
PP
level is then applied to the V
PP
input (P0.0). This sets Port 1 as an input port.
c) The data to be programmed into the EPROM array
is then placed on Port 3. This is followed by a
series of programming pulses applied to the PROG
pin (P0.1). These pulses are created by driving
P0.1 LOW and then HIGH. This pulse is repeated
until a total of 25 programming pulses have
occurred. At the conclusion of the last pulse, the
PROG signal should remain HIGH.
4.
The V
PP
signal may now be driven to the V
OH
level,
placing the 87C055 in the Verify Mode; Port 3 is now
used as an output port. After four machine cycles
(48 clock periods), the contents of the addressed
location in the EPROM array will appear on Port 3.
5.
The next programming cycle may now be initiated by:
a) Placing the address information at the inputs of the
multiplexed buffers.
b) Driving the V
PP
pin to the V
PP
voltage level.
c) Providing the byte to be programmed to Port 3 and
issuing the 26 programming pulses on the PROG
pin.
d) Bringing V
PP
back down to the V
OH
level and
verifying the byte (see Table 33).
14.3
Erasure Characteristics
Erasure of the EPROM begins to occur when the chip is
exposed to light with wavelengths shorter than
approximately 4000 Angstroms. Since sunlight and
fluorescent lighting have wavelengths in this range,
exposure to these light sources over an extended time
(about 1 week in sunlight, or 3 years in room level
fluorescent lighting) could cause inadvertent erasure.
For this and secondary effects, it is recommended that an
opaque label be placed over the window. For elevated
temperature or environments where solvents are being
used, apply Kapton tape Fluorless (part number 2345-5) or
equivalent.
The recommended erasure procedure is exposure to
ultraviolet light (at 2537 Angstroms) to an integrated dose
of at least 15 Ws/cm
2
.
Exposing the EPROM to an ultraviolet lamp of
12000
μ
W/cm
2
rating for 20 to 39 minutes, at a distance of
about 1 inch, should be sufficient. Erasure leaves the array
in an all logic 1s state.
14.4
Reading Signature Bytes
The Signature Bytes are read by the same procedure as a
normal verify of locations 30H and 31H (the values are
shown in Table 32), except that the serial code indicated in
Table 33 for reading signature bytes should be used.
Table 32
Programming and Verification codes
Table 33
Implementing Program/Verify Modes
Note
1.
Pulsed from V
IH
to V
IL
and returned to V
IH
.
ADDRESS
CONTENT
INDICATION
30H
31H
15H
4BH
manufactured by Philips
87C055
OPERATION
SERIAL
CODE
P0.1
(PROG)
(1)
V
IH
V
IH
P0.0
(V
PP
)
V
PP
V
IH
V
IH
Program user EPROM
Verify user EPROM
Read Signature Bytes
286H
286H
280H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P87C055BBP | Microcontrollers for TV and video MTV |
| P83C055BBP | Microcontrollers for TV and video MTV |
| P83C145BBP | MICRO 21 F SOD |
| P83C851FBA | CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P80C851IBA | CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P87C055BBNB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| P87C055BBP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontrollers for TV and video MTV |
| P87C151SA | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P87C151SB | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P87C251SA16 | 功能描述:IC MCU 8-BIT 8K 16MHZ OTP 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。