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参数资料
| 型号： | ST92186B3BK |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | PLASTIC, SDIP-32 |
| 文件页数： | 107/148页 |
| 文件大小： | 1664K |
| 代理商： | ST92186B3BK |
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ST92186B - TIMING AND CLOCK CONTROLLER (TCC)
5.2 REGISTER DESCRIPTION
SKEW CLOCK CONTROL REGISTER (SKCCR)
R254 - Read/ Write
Register Page: 43
Reset value: 0000 0000 (00h)
The HALT mode forces the register to its initializa-
tion state.
Bit 7= SKWEN:
Frequency Multiplier Enable bit.
0: FM disabled (reset state), low-power consump-
tion mode.
1: FM is enabled providing clock to the Skew cor-
rector. The SKWEN bit must be set only after
programming the SKW(3-0) bits.
Bit 6 = SKDIV2:
Skew Divide-by-2 Enable bit.
0: Divide-by-2 disabled.
1: Divide-by-2 enabled.
This bit must be kept in reset state.
Bits 5:4 = Reserved. These bits are forced to 0 by
hardware.
Bits 3:0 = SKW:
Skew Counter.
These 4 bits program the down-counter inserted in
the feedback loop of the Frequency Multiplier
which generates the internal multiplied frequency
PIXCLK. The PIXCLK value is calculated as fol-
lows :
If FPIXC=0 :
F(PIXCLK)=Crystal frequency * [ (SKW(3:0)+1) ]/2
If FPIXC=1 :
F(PIXCLK)=Crystal frequency * [ (SKW(3:0)+1) ]
Note: To program the FPIXC bit, refer to the de-
scription of the OSDER register in the OSD chap-
ter.
MAIN CLOCK CONTROL REGISTER (MCCR)
R253 - Read/ Write
Register Page: 43
Reset value: 0000 0000 (00h)
The HALT mode forces the register to its initializa-
tion state.
Bit 7 = FMEN:
Frequency Multiplier Enable bit.
0: FM disabled (reset state), low-power consump-
tion mode.
1: FM is enabled, providing clock to the CPU. The
FMEN bit must be set only after programming
the FML(3:0) bits.
Bit 6 = FMSL:
Frequency Multiplier Select bit.
This bit controls the choice of the ST9 core internal
frequency between the external crystal frequency
and the Main Clock issued by the frequency multi-
plier.
In order to secure the application, the ST9 core in-
ternal frequency is automatically switched back to
the external crystal frequency if the frequency mul-
tiplier is switched off (FMEN =0) regardless of the
value of the FMSL bit. Care must be taken to reset
the FMSL bit before any frequency multiplier can
restart (FMEN set back to 1).
After reset, the external crystal frequency is al-
ways sent to the ST9 Core.
Bits 5:4 = Reserved. These bits are forced to 0 by
hardware.
Bits 3:0 = FML:
FM Counter.
These 4 bits program the down-counter inserted in
the feed-back loop of the Frequency Multiplier
which generates the internal multiplied frequency
Fimf. The Fimf value is calculated as follows :
Fimf = Crystal frequency * [ (FML(3:0) + 1) ] /2
7
6
5
4
32
10
SKWEN
SKDIV2
0
SKW3
SKW2
SKW1
SKW0
7
6
5
4
321
0
FMEN FMSL
0
FML3 FML2 FML1 FML0
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PDF描述 |
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| ST92195B3B1/XXX | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56 |
| ST92195B4B1/XXX | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56 |
| ST92195B5T1/XXX | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST92195 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
| ST92195B | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
| ST92195B1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
| ST92195B1B1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
| ST92195B1T1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
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