- 您现在的位置：买卖IC网 > PDF目录69349 > ST6280BQ6/XXX (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100 PDF资料下载
参数资料
| 型号： | ST6280BQ6/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | PLASTIC, QFP-100 |
| 文件页数： | 11/80页 |
| 文件大小： | 934K |
| 代理商： | ST6280BQ6/XXX |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页
Obsolete
Product(s)
- Obsolete
Product(s)
19/80
ST62T80B/E80B
CLOCK SYSTEM (Cont’d)
3.1.2 32 KHz 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 214 to
generate interrupt request every 500ms . The peri-
odic interrupt request serves as reference time-
base 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 (fINT/13),
this produces an interrupt request every 13x214
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
time
(providing
a
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. O
scillator Start/Stop bit.
This bit, when set, enables the 32KHz stand-by
oscillator 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
fINT/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.
Figure 10. 32KHz Oscillator Block Diagram
70
EOSCI OSCEOC
S/S
D4
D3
D2
D1
D0
OSC32KHz
EOSCI
OSCEOC
START
STOP
X
XX
X
INT
OSC32IN
OSC32OUT
2x15...22pF
32.768KHz
Crystal
fINT/13
OSC32KHz
MUX
1
0
DIV 214
19
相关PDF资料 |
PDF描述 |
|---|---|
| ST6285Q6/XX | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP80 |
| ST62E25CF1 | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP28 |
| ST62P15CB3 | MICROCONTROLLER, PDIP28 |
| ST6215CB3/CCC | MICROCONTROLLER, PDIP28 |
| ST62P15CM3 | MICROCONTROLLER, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST6280-EMU2 | 功能描述:开发板和工具包 - 其他处理器 ST62 Emulator Board RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| ST6280-P/QFP | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:REAL TIME EMULATION DEVELOPMENT TOOLS FOR ST6 MCU FAMILY |
| ST6280Q1/XX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST6280Q6/XX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST6281T6/HEA/TR | 制造商:STMicroelectronics 功能描述: |
发布紧急采购，3分钟左右您将得到回复。