參數(shù)資料
型號： P87CL52X2BDH
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 80C51 8-bit microcontroller family
中文描述： 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDSO38
封裝： 4.40 MM, 0.50 MM PITCH, PLASTIC, SHRINK, SOT-510-1, TSSOP-38
文件頁數(shù)： 41/47頁
文件大?。?/td> 301K
代理商： P87CL52X2BDH
Philips Semiconductors
Product data
P87CL52X2/54X2
80C51 8-bit microcontroller family
8K/16K OTP 256 bytes RAM ROMless low voltage
(1.8 V to 3.3 V), low power, high speed (33 MHz)
2003 May 14
41
EPROM CHARACTERISTICS
The OTP devices described in this data sheet can be programmed
by using a modified Improved Quick-Pulse Programming
algorithm. It differs from older methods in the value used for V
PP
(programming supply voltage) and in the width and number of the
ALE/PROG pulses.
The family contains two signature bytes that can be read and used
by an EPROM programming system to identify the device. The
signature bytes identify the device as being manufactured by
Philips.
Table 8 shows the logic levels for reading the signature byte, and for
programming the program memory, the encryption table, and the
security bits. The circuit configuration and waveforms for quick-pulse
programming are shown in Figures 33 and 34. Figure 35 shows the
circuit configuration for normal program memory verification.
Quick-Pulse Programming
The setup for microcontroller quick-pulse programming is shown in
Figure 33. Note that the device is running with a 4 to 6 MHz
oscillator. The reason the oscillator needs to be running is that the
device is executing internal address and program data transfers.
The address of the EPROM location to be programmed is applied to
ports 1 and 2, as shown in Figure 33. The code byte to be
programmed into that location is applied to port 0. RST, PSEN and
pins of ports 2 and 3 specified in Table 8 are held at the ‘Program
Code Data’ levels indicated in Table 8. The ALE/PROG is pulsed
low 5 times as shown in Figure 34.
To program the encryption table, repeat the 5 pulse programming
sequence for addresses 0 through 1FH, using the ‘Pgm Encryption
Table’ levels. Do not forget that after the encryption table is
programmed, verification cycles will produce only encrypted data.
To program the security bits, repeat the 5 pulse programming
sequence using the ‘Pgm Security Bit’ levels. After one security bit is
programmed, further programming of the code memory and
encryption table is disabled. However, the other security bits can still
be programmed.
Note that the EA/V
PP
pin must not be allowed to go above the
maximum specified V
PP
level for any amount of time. Even a narrow
glitch above that voltage can cause permanent damage to the
device. The V
PP
source should be well regulated and free of glitches
and overshoot.
Program Verification
If security bits 2 and 3 have not been programmed, the on-chip
program memory can be read out for program verification. The
address of the program memory locations to be read is applied to
ports 1 and 2 as shown in Figure 35. The other pins are held at the
‘Verify Code Data’ levels indicated in Table 8. The contents of the
address location will be emitted on port 0. External pull-ups are
required on port 0 for this operation.
If the 64 byte encryption table has been programmed, the data
presented at port 0 will be the exclusive NOR of the program byte
with one of the encryption bytes. The user will have to know the
encryption table contents in order to correctly decode the verification
data. The encryption table itself cannot be read out.
Reading the Signature bytes
The signature bytes are read by the same procedure as a normal
verification of locations 030h and 031h, except that P3.6 and P3.7
need to be pulled to a logic low. The values are:
(030h) =
15h; indicates manufacturer (Philips)
(031h) =
92h — P87CL52X2
BBH — P87CL54X2
Program/Verify Algorithms
Any algorithm in agreement with the conditions listed in Table 8, and
which satisfies the timing specifications, is suitable.
Security Bits
With none of the security bits programmed the code in the program
memory can be verified. If the encryption table is programmed, the
code will be encrypted when verified. When only security bit 1 (see
Table 9) is programmed, MOVC instructions executed from external
program memory are disabled from fetching code bytes from the
internal memory, EA is latched on Reset and all further programming
of the EPROM is disabled. When security bits 1 and 2 are
programmed, in addition to the above, verify mode is disabled.
When all three security bits are programmed, all of the conditions
above apply and all external program memory execution is disabled.
Encryption Array
64 bytes of encryption array are initially unprogrammed (all 1s).
Trademark phrase of Intel Corporation.
相關(guān)PDF資料
PDF描述
P87CL54X2BBD 80C51 8-bit microcontroller family
P87CL881H Low-voltage microcontroller with 63-kbyte OTP program memory and 2-kbyte RAM(帶63K字節(jié)OTP程序存儲器和2K字節(jié)RAM的低壓微控制器)
P87LPC762BD512 IC-SM-8-BIT MCU
P87LPC762FD512 IC-SM-8-BIT MCU
P87LPC764 Low power. low price. low pin count (20 pin) microcontroller with 4 kbyte OTP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P87L42 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:UNIVERSAL PERIPHERAL INTERFACE CHMOS 8-BIT SLAVE MICROCONTROLLER
P87LPC759 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC759BN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC760 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC760BDH 功能描述:8位微控制器 -MCU 80C51 1K/128 OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*