參數(shù)資料
型號: P87C654X2
廠商: NXP Semiconductors N.V.
英文描述: Octal Edge-Triggered D-Type Flip-Flops with 3-State Outputs 20-CDIP -55 to 125
中文描述: 80C51的8位單片機(jī)系列16kB的檢察官辦公室/光盤,256B的RAM,低電壓(2.7至5.5 V),低功耗,高速(三十三分之三十〇兆赫)
文件頁數(shù): 84/88頁
文件大?。?/td> 497K
代理商: P87C654X2
Philips Semiconductors
Product data
P83C654X2/P87C654X2
80C51 8-bit microcontroller family
16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
2004 Apr 20
84
ROM CODE SUBMISSION FOR 16K ROM DEVICES
When submitting ROM code for the 16K ROM devices, the following must be specified:
1. 16 kbyte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
ADDRESS
CONTENT
BIT(S)
COMMENT
0000H to 3FFFH
DATA
7:0
User ROM Data
4000H to 403FH
KEY
7:0
ROM Encryption Key
FFH = no encryption
4040H
SEC
0
ROM Security Bit 1
0 = enable security
1 = disable security
4040H
SEC
1
ROM Security Bit 2
0 = enable security
1 = disable security
Security Bit 1:
When programmed, this bit has two effects on masked ROM parts:
1. External MOVC is disabled, and
2. EA is latched on Reset.
Security Bit 2:
When programmed, this bit inhibits Verify User ROM.
NOTE:
Security Bit 2 cannot be enabled unless Security Bit 1 is enabled.
If the ROM Code file does not include the options, the following information must be included with the ROM code.
For each of the following, check the appropriate box, and send to Philips along with the code:
Security Bit #1:
Enabled
Disabled
Security Bit #2:
Enabled
Disabled
Encryption:
No
Yes
If Yes, must send key file.
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