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參數(shù)資料
| 型號(hào)： | X4165V8I-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | CPU Supervisor with 16K EEPROM |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | PLASTIC, MO-153AC, TSSOP-8 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大小： | 118K |
| 代理商： | X4165V8I-2.7 |
X46402
Characteristics subject to change without notice.
4 of 23
Password Protection Configuration
Portions of the memory array may be “l(fā)ocked”. This
area of memory is password protected and is defined
by the bits BL2, BL1 and BL0. For these protected
areas it is necessary to use a Read password to out-
put data and an “Array Write” Password to write data.
This block lock area is re-writable, by issuing the cor-
rect password.
SERIAL MEMORY OPERATION
There are four primary modes of operation for the
X46402; Protected READ and WRITE of the memory
and OTP arrays and unprotected Read and Write of
non-password protected areas of the memory array.
Protected operations must be performed with one of
four 8-byte passwords.
The basic method of communication for the password
protected areas of the device is established by gener-
ating a start condition, then transmitting a command,
followed by the correct password. All parts will be
shipped from the factory with all passwords equal to
‘0’. The user must perform ACK Polling to determine
the validity of the password, before starting a data
transfer (see Acknowledge Polling.) Only after the cor-
rect password is accepted and a ACK polling has been
performed, can the data transfer occur.
Non-password protected areas of the memory array
are accessed in the same manner as access to pass-
word protected areas, except the password and the
password acknowledge polling sequences are not
required.
Data is transferred in 8-bit segments, with each trans-
fer being followed by an ACK, generated by the receiv-
ing device.
If the X46402 is in a nonvolatile write cycle a “no ACK”
(SDA=HIGH) response will be issued in response to
loading of the command byte. If a stop is issued prior
to the start of a nonvolatile write cycle the write opera-
tion will be terminated and the part will reset and enter
into a standby mode.
The basic sequence is illustrated in Figure 1.
After each transaction is completed, the X46402 will
reset and enter into a standby mode. This will also be
the response if an unsuccessful attempt is made to
access a protected array.
Password Protection
The X46402 requires a 64 bit write password to
change the contents of the control register or to write
to a block protected memory area. The X46402 also
requires a 64 bit read password to output the contents
of the block protected array or the control register. The
block protection is controlled by the [BL2:BL0] bits and
allows the options described in Table 2. If an area is
block protected, it needs a password prior to each
read or write to the area. The passwords cannot be
read, even after the device receives the correct pass-
word.
Figure 1. X46402 Device Operation (Password
Protected Areas)
Table 2. Password Protected Block Size Select
BL2
BL1
BL0
Password Protected
Addresses
(Use Password
Command)
Non-Password
Protected Addresses
(Use Password or No-
Password Commands)
000
None
0000h - 1FFFh
001
0000
h
- 003F
h
0040h - 1FFFh
010
0000
h
- 007F
h
0080h - 1FFFh
011
0000
h
- 00FF
h
0100h - 1FFFh
100
0000h - 01FFh
0200h - 1FFFh
101
0000h - 07FFh
0800h - 1FFFh
110
0000h - 0FFFh
0000h - 1FFFh
1000h - 1FFFh
111
None
Load Command Byte
Load 2 Byte Address
Load 8-Byte
Password
Verify Password
Acceptance by
Use of Password ACK Polling
Read/Write
Data Bytes
TWC or Data ACK Polling
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| X4165V8I-4.5A | 功能描述:IC SUPERVISOR CPU 16K EE 8-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:- 復(fù)位:低有效 復(fù)位超時(shí):最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件 |
| X41D255 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| X41K1 | 制造商:ABB Low Voltage Products and Systems 功能描述:CCT,1KVA,460V,SINGLE |
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