參數(shù)資料
型號(hào)： MCP4242T-502E/UN
廠商： Microchip Technology
文件頁(yè)數(shù)： 43/88頁(yè)
文件大?。?/td> 0K
描述： IC RHEOSTAT 5K 2CH 10MSOP
標(biāo)準(zhǔn)包裝： 2,500
系列： WiperLock™
接片： 129
電阻（歐姆）： 5k
電路數(shù)： 2
溫度系數(shù)： 標(biāo)準(zhǔn)值 150 ppm/°C
存儲(chǔ)器類型： 非易失
接口： 4 線 SPI（芯片選擇）
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-MSOP
包裝： 帶卷 (TR)
其它名稱： MCP4242T-502-E/UN
MCP4242T-502-E/UNTR
MCP4242T-502-E/UNTR-ND
MCP4242T-502E/UNTR
MCP414X/416X/424X/426X
DS22059B-page 48
2008 Microchip Technology Inc.
7.4
Continuous Commands
The device supports the ability to execute commands
continuously. While the CS pin is in the active state (VIL
or VIHH). Any sequence of valid commands may be
received.
The following example is a valid sequence of events:
1.
CS pin driven active (VIL or VIHH).
2.
Read Command.
3.
Increment Command (Wiper 0).
4.
Increment Command (Wiper 0).
5.
Decrement Command (Wiper 1).
6.
Write Command (Volatile memory).
7.
Write Command (Non-Volatile memory).
8.
CS pin driven inactive (VIH).
TABLE 7-3:
COMMANDS
Note 1:
It is recommended that while the CS pin is
active, only one type of command should
be issued. When changing commands, it
is recommended to take the CS pin
inactive then force it back to the active
state.
2:
It is also recommended that long
command strings should be broken down
into shorter command strings. This
reduces the probability of noise on the
SCK pin corrupting the desired SPI
command string.
Command Name
# of
Bits
Writes
Value in
EEPROM
Operates on
Volatile/
Non-Volatile
memory
High
Voltage
(VIHH) on
CS pin?
Impact on
WiperLock or
Write Protect
Works
when
Wiper is
“l(fā)ocked”?
16-Bits
Yes (1)
Both
—
unlocked (1)
No
16-Bits
—
Both
—
unlocked (1)
No
8-Bits
—
Volatile Only
—
unlocked (1)
No
8-Bits
—
Volatile Only
—
unlocked (1)
No
High Voltage Write Data
16-Bits
Yes
Both
Yes
unchanged
No
High Voltage Read Data
16-Bits
—
Both
Yes
unchanged
Yes
High Voltage Increment Wiper
8-Bits
—
Volatile Only
Yes
unchanged
No
High Voltage Decrement Wiper
8-Bits
—
Volatile Only
Yes
unchanged
No
-
Enable
8-Bits
— (2)
Non-Volatile
Only (2)
Yes
locked/
protected (2)
Yes
-
Disable
8-Bits
— (3)
Non-Volatile
Only (3)
Yes
unlocked/
unprotected (3)
Yes
Note 1:
This command will only complete if wiper is “unlocked” (WiperLock Technology is Disabled).
2:
If the command is executed using address 02h or 03h, then that corresponding wiper is locked or
if with address 0Fh, then Write Protect is enabled.
3:
If the command is executed using with address 02h or 03h, then that corresponding wiper is unlocked or
if with address 0Fh, then Write Protect is disabled.
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