參數資料
型號： ST6240B
廠商： 意法半導體
英文描述： Replaced by PT6302 : 5Vout 3A Wide Input Positive Step-Down ISR 3-SIP MODULE -40 to 70
中文描述： 8位檢察官辦公室/存儲器與LCD驅動器，EEPROM和一個微處理器/ D轉換器
文件頁數： 19/76頁
文件大小： 1280K
代理商： ST6240B
19/76
ST62T40B/E40B
CLOCK SYSTEM
(Cont’d)
3.1.2 32kHz STAND-BY OSCILLATOR
An additional 32kHz stand-by on chip oscillator al-
lows to generate real time interrupts and to supply
the clock to the LCD driver with the main oscillator
stopped. This enables the MCU to perform real
time functions with the LCD display running while
keeping advantages of low power consumption.
Figure 10
shows the 32kHz oscillator block dia-
gram.
A 32.768kHz quartz crystal must be connected to
the OSC32in and OSC32out pins to perform the
real time clock operation. Two external capacitors
of 15-22pF each must be connected between the
oscillator pins and ground. The 32kHz oscillator is
managed by the dedicated status/control register
32OCR.
As long as the 32kHz stand-by oscillator is ena-
bled, 32kHz internal clock is available to drive LCD
controller driver. This clock is divide by 2
14
to gen-
erate interrupt request every 500ms . The periodic
interrupt request serves as reference timebase for
real time functions.
Note
: When the 32kHz stand-by oscillator is
stopped (bit 5 of the Status/Control register
cleared) the divider chain is supplied with a clock
signal synchronous with machine cycle (f
INT
/13),
this produces an interrupt request every 13x2
14
clock cycle (i.e. 26.624ms) with an 8MHz quartz
crystal.
32kHz Oscillator Register (32OCR)
Address: DBh - Read/Write
Bit 7 =
EOSCI
. Enable Oscillator Interrupt. This bit,
when set, enables the 32kHz oscillator interrupt
request.
Bit 6 =
OSCEOC
. Oscillator Interrupt Flag This bit
indicates when the 32kHz oscillator has measured
a
500ms
elapsed
32.768kHzquartz crystal is connected to the
32kHz oscillator dedicated pins). An interrupt re-
quest can be generated in relation to the state of
EOSCI bit. This bit must be cleared by the user
program before leaving the interrupt service rou-
tine.
Bit 5 =
START/STOP
. Oscillator Start/Stop bit
This bit, when set, enables the 32kHz stand-by os-
cillator and the free running divider chain is sup-
plied by the 32kHz oscillator signal. When this bit
is cleared to zero the divider chain is supplied with
f
INT
/13.
This register is cleared during reset.
Note
:
To achieve minimum power consumption in STOP
mode (no system clock), the stand-by oscillator
must be switched off (real time function not availa-
ble) by clearing the Start/Stop bit in the oscillator
status/control register.
time
(providing
a
Figure 10. 32kHz Oscillator Block Diagram
7
0
EOSCI OSCEOC
S/S
D4
D3
D2
D1
D0
OSC32KHz
EOSCI
OSCEOC
START
STOP
X
X
X
X
X
INT
OSC32IN
OSC32OUT
2x15...22pF
32.768kHz
Crystal
f
INT
/13
OSC32KHz
MUX
1
0
DIV 2
14
591
相關PDF資料
PDF描述
ST62E18C 16-Bit Registered Transceivers With 3-State Outputs 56-SSOP -40 to 85
ST62T18C 8-BIT MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, UART, OSG, SAFE RESET AND 20-PIN PACKAGE
ST62E40B The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each
ST62T40B The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each
ST62T10 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER
相關代理商/技術參數
參數描述
ST6240B-EMU2 功能描述:仿真器/模擬器 ST62 Emulator Board RoHS:否 制造商:Blackhawk 產品:System Trace Emulators 工具用于評估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2
ST6240BQ1 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. LCD DRIVER. EEPROM. A/D CONVERTER AND 80 PINS
ST6240BQ1/XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
ST6240BQ6 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. LCD DRIVER. EEPROM. A/D CONVERTER AND 80 PINS
ST6240BQ6/XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯系方式

*
*
*