- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382377 > PCA5010H (NXP Semiconductors N.V.) Pager baseband controller PDF資料下載
參數(shù)資料
| 型號(hào)： | PCA5010H |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Pager baseband controller |
| 中文描述： | 傳呼機(jī)基帶控制器 |
| 文件頁數(shù)： | 67/112頁 |
| 文件大?。?/td> | 627K |
| 代理商： | PCA5010H |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁當(dāng)前第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁
1998 Nov 02
67
Philips Semiconductors
Product specification
Pager baseband controller
PCA5010
6.22.4
D
ESCRIPTION OF OPERATING MODES
6.22.4.1
Normal operating mode
Once the system is powered-up successfully (STB = 1),
the DC/DC converter is in normal operating mode. This
mode has two sub modes:
Normal mode
Standby mode.
By setting/resetting the standby bit in DCCON0 (D1H), the
DC/DC converter switches between normal mode and
standby mode. Switching between these two modes is
possible at any time by software if the controller is in
normal operating mode. Normal operating mode can be
exited by any of the following events:
HIGH level at the RESETIN pin
A watchdog reset, which will force the same sequence
as an off command
Writing the off bit in DCCON0.
Setting the off bit in DCCON0 forces the converter into
DC/DC converter off mode.
6.22.4.2
Normal mode
Normal mode is the high efficiency mode of the DC/DC
converter. In this mode the controller can keep V
DD
stable
at 2.2 V up to the maximum available current (see Fig.37).
The output voltage is regulated in a small window and the
current peaks in the coil are kept as small as possible (see
Fig.45). After a reset and the following start-up sequence,
the controller is in normal mode.
To shorten the settling time when the receiver is switched
on or off, the DC/DC converter uses 2 sets of coefficients.
One for low output current and one for high output current.
When the RXE bit in DCCON0 is set, the DC/DC converter
stores the actual coefficients for low output current and
switches to the coefficients for high load current. At the
same time the receiver should be enabled. When the
battery voltage did not change very much since the last
time the receiver was on, the settling time is only a few
microseconds instead of a few hundreds of microseconds
when not using the RXE bit. When switching off the
receiver, the RXE bit in DCCON0 should be reset. In this
case, the DC/DC converter stores the new values for high
output current and restores the values for low output
current. It should be noted that the RXE bit does not
change the algorithm of the DC/DC converter but shortens
the settling time dramatically.
When the load is so high that the required output current
cannot be delivered, the DC/DC converter resets the
signal STB and a DC/DC interrupt is issued to the
processor via IRQ SFR IRQ1.5. STB = 0 flags the inability
to deliver enough current in normal mode or in standby
mode. When the STB flag is set to logic 0, V
DD
can drop
very quickly, depending on the battery voltage and the
load.
6.22.4.3
Standby mode
Standby mode is a low current mode which can be used
when only the microcontroller is running and the quality of
V
DD
is not important. In standby mode the DC/DC
converter uses the 76.8 kHz clock instead of the 6 MHz
clock. This reduces the current consumption of the DC/DC
converter. The maximum output current in this mode is
limited to a few milliamps (see Fig.38). In standby mode
V
DD
can be set to 1.9, 2.0, 2.1 or 2.2 V by setting the
VLO1 and VLO0 bits in DCCON1 to the corresponding
values. When the load is so high that the required output
current cannot be delivered, the DC/DC converter resets
the signal STB and a DC/DC interrupt is issued to the
processor via IRQ SFR IRQ1.5. In this case, the
microcontroller should switch off the different loads and
switch to normal mode.
6.22.4.4
Off mode
Off mode can only be entered by setting the off bit in
DCCON0 by software. The DC/DC converter waits for
15 periods of the 76.8 kHz clock before it sets V
DD
to V
BAT
and switches off completely (see Fig.41). In the off mode
the PMOS is conducting and therefore it is guaranteed that
V
DD
never drops below V
BAT
100 mV. When the DC/DC
converter is in off mode, one of the following events can
restart the converter:
P1X (independent from interrupt enabling or polarity)
Minute
Wake-up
RESETIN pulse.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCA82C200 | STAND-ALONE CAN-CONTROLLER |
| PCA82C200P | STAND-ALONE CAN-CONTROLLER |
| PCA82C200T | STAND-ALONE CAN-CONTROLLER |
| PCA82C250 | CAN controller interface |
| PCA82C250U | CAN controller interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA5010H/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|48PIN|PLASTIC |
| PCA503HL320 | 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:ZIF FLEX CIRCUIT CONNECTOR |
| PCA503HU320 | 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:ZIF FLEX CIRCUIT CONNECTOR |
| PCA503V320 | 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:ZIF FLEX CIRCUIT CONNECTOR |
| PCA5075 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。