參數(shù)資料
型號(hào): MSP430FW425IPM
廠商: TEXAS INSTRUMENTS INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 8 MHz, RISC MICROCONTROLLER, PQFP64
封裝: GREEN, PLASTIC, QFP-64
文件頁(yè)數(shù): 30/61頁(yè)
文件大?。?/td> 828K
代理商: MSP430FW425IPM
ISource(SIFCOM)
SIFCOM
VCC
VCC/2
ISink(SIFCOM)
MSP430FW42x
SLAS383D – OCTOBER 2003 – REVISED JANUARY 2011
www.ti.com
Scan IF, VCC/2 Generator
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
UNIT
Analog supply
AVCC = DVCC (connected together),
AVCC
2.2
3.6
V
voltage
AVSS = DVSS (connected together)
Scan IF VCC/2
2.2 V
250
350
generator operating
CL at SIFCOM pin = 470 nF ±20%,
AICC
nA
supply current into
frefresh(SIFCOM) = 32768 Hz
3 V
370
450
AVCC terminal
VCC/2 refresh
frefresh(SIFCOM)
Source clock = ACLK
2.2 V/3 V
30
32.768
kHz
frequency
Output voltage at pin CL at SIFCOM pin = 470 nF ±20%,
AVCC/2 -
AVCC/2 +
V(SIFCOM)
AVCC/2
V
SIFCOM
ILoad = 1 A
0.05
SIFCOM source
2.2 V
-500
Isource(SIFCOM)
current(1) (see
A
3 V
-900
2.2 V
150
Isink(SIFCOM)
SIFCOM sink current
nA
3 V
180
ILoad1 = ILOAD3 = 0 mA,
Time to recover from
trecovery(SIFCOM)
ILoad2 = 3 mA, tload(on) = 500 ns,
2.2 V/3 V
30
s
voltage drop on load
CL at SIFCOM pin = 470 nF ±20%
Time to reach 98%
CL at SIFCOM pin = 470 nF ±20%,
ton(SIFCOM)
after VCC/2 is
2.2 V/3 V
1.7
6
ms
frefresh(SIFCOM) = 32768 Hz
switched on
SIFEN = 1, SIFVCC2 = 1, SIFSH = 0,
Settling time to
AVCC = AVCC - 100 mV,
2.2 V/3 V
80
±VCC/512 (2 LSB)
frefresh(SIFCOM) = 32768 Hz
tVccSettle(SIFCOM)
ms
after AVCC voltage
AVCC = AVCC + 100 mV,
change
2.2 V/3 V
3
frefresh(SIFCOM) = 32768 Hz
(1)
The sink and source currents are a function of the voltage at the pin SIFCOM. The maximum currents are reached if SIFCOM is shorted
to GND or VCC. Due to the topology of the output section (see Figure 20) the VCC/2 generator can source relatively large currents but
can sink only small currents.
Figure 20. P6.x/SIFCHx Timing, SIFCHx Function Selected
36
Copyright 2003–2011, Texas Instruments Incorporated
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