參數(shù)資料
型號： MCP4531T-103E/MS
廠商： Microchip Technology
文件頁數(shù)： 31/88頁
文件大?。?/td> 0K
描述： IC POT DGTL 10K SGL 8-MSOP
標(biāo)準(zhǔn)包裝： 2,500
接片： 129
電阻（歐姆）： 10k
電路數(shù)： 1
溫度系數(shù)： 標(biāo)準(zhǔn)值 150 ppm/°C
存儲器類型： 易失
接口： I²C（設(shè)備位址）
電源電壓： 1.8 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 帶卷 (TR)
2008 Microchip Technology Inc.
DS22096A-page 37
MCP453X/455X/463X/465X
4.0
FUNCTIONAL OVERVIEW
This Data Sheet covers a family of thirty-two Digital
Potentiometer and Rheostat devices that will be
referred to as MCP4XXX. The MCP4XX1 devices are
the Potentiometer configuration, while the MCP4XX2
devices are the Rheostat configuration.
As the Device Block Diagram shows, there are four
main functional blocks. These are:
The POR/BOR operation and the Memory Map are
discussed in this section and the Resistor Network and
I2C operation are described in their own sections. The
Device Commands commands are discussed in
4.1
POR/BOR Operation
The Power-on Reset is the case where the device is
having power applied to it starting from the VSS level.
The Brown-out Reset occurs when a device had power
applied to it, and that power (voltage) drops below the
specified range.
The devices RAM retention voltage (VRAM) is lower
than the POR/BOR voltage trip point (VPOR/VBOR). The
maximum VPOR/VBOR voltage is less than 1.8V.
When VPOR/VBOR < VDD < 2.7V, the electrical
performance
may
not
meet
the
data
sheet
specifications. In this region, the device is capable of
incrementing, decrementing, reading and writing to its
volatile memory if the proper serial command is exe-
cuted.
4.1.1
POWER-ON RESET
When the device powers up, the device VDD will cross
the VPOR/VBOR voltage. Once the VDD voltage crosses
the VPOR/VBOR voltage the following happens:
Volatile wiper register is loaded with value in the
corresponding non-volatile wiper register
The TCON register is loaded it’s default value
The device is capable of digital operation
4.1.2
BROWN-OUT RESET
When the device powers down, the device VDD will
cross the VPOR/VBOR voltage.
Once the VDD voltage decreases below the VPOR/VBOR
voltage the Serial Interface is disabled.
If the VDD voltage decreases below the VRAM voltage
the following happens:
Volatile wiper registers may become corrupted
TCON register may become corrupted
As the voltage recovers above the VPOR/VBOR voltage
Serial commands not completed due to a brown-out
condition may cause the volatile memory location to
become corrupted.
4.2
Memory Map
The device memory map supports 16 locations, of
which 3 locations are used. Each location is 9-bits wide
(16x9 bits). This memory space is shown in Table 4-1.
TABLE 4-1:
MEMORY MAP
4.2.1
VOLATILE MEMORY (RAM)
There are four Volatile Memory locations. These are:
Volatile Wiper 0
Volatile Wiper 1
(Dual Resistor Network devices only)
Terminal Control (TCON) Register
Reserved
The volatile memory starts functioning at the RAM
retention voltage (VRAM).
4.2.1.1
Address 05h (Reserved)
This memory location is Reserved and is mapped to
the Status Register of the Non-Volatile MCP45XX/
46XX devices. Since the Non-Volatile devices bits are
not used by the volatile device, this location is
reserved. Reading this address wil result in a value of
1F7h.
Address
Function
Memory Type
00h
Volatile Wiper 0
RAM
01h
Volatile Wiper 1
RAM
02h
Reserved
—
03h
Reserved
—
04h
Volatile TCON Register
RAM
05h
Reserved
RAM
06h - 0Fh Reserved
—
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