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參數資料
| 型號： | HT95A400 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Time-Delay Relay; Mounting Type:Plug In; Relay Mounting:Plug-In |
| 中文描述： | I / O型電話8位微控制器 |
| 文件頁數： | 25/48頁 |
| 文件大小： | 360K |
| 代理商： | HT95A400 |
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HT95AXXX
Rev. 1.20
25
May 26, 2004
The PFD (programmable frequency divider) is implemented in the phone controller. It is composed of two portions: a
prescaler and a general counter.
The prescaler is controlled by the register bits, PRES0 and PRES1. The general counter is programmed by an 8-bit
register PFDD.
The source for this generator can be selected from 3.58MHz/4 or 32768Hz. To enable the PFD output, write 1 to the
PFDEN bit.
The PFDD is inhibited to write while the PFD is disabled. To modify the PFDD contents, the PFD must be enabled.
When the generator is disabled, the PFDD is cleared by hardware.
PFD output frequency=Prescaler output
2x(N+1)
, where N=the value of the PFDD
Mask Option Table
The following shows many kinds of mask options in the telephone controller. All these options should be defined in or-
der to ensure proper system functions.
Name
Mask Option
WDT
WDT source selection
RC
Select the WDT OSC to be the WDT source.
T1
Select the instruction clock to be the WDT source.
32kHz
Select the external 32768Hz to be the WDT source.
Disable
Disable WDT function.
CLRWDT
This option defines how to clear the WDT by instruction.
One clear instruction
The CLR WDT can clear the WDT.
Two clear instructions
Only when both of the CLR WDT1 and CLR WDT2 have been executed,
then WDT can be cleared.
Wake-up PA
Port A wake-up selection.
Define the activity of wake-up function.
All port A have the capability to wake-up the chip from a HALT.
This wake-up function is selected per bit.
Pull-high PA
Pull-high PB
Pull-high PD
Pull-high PE
Pull-high PF
Pull-high PG
Pull-high option.
This option determines whether the pull-high resistance is viable or not.
Port A pull-high option is selected per bit.
Port B pull-high option is selected per bit.
Port D pull-high option is selected per nibble.
Port E pull-high option is selected per nibble.
Port F pull-high option is selected per nibble.
Port G pull-high option is selected per nibble.
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相關PDF資料 |
PDF描述 |
|---|---|
| HT95A100 | I/O Type Phone 8-Bit MCU |
| HT95A200 | I/O Type Phone 8-Bit MCU |
| HT95A300 | I/O Type Phone 8-Bit MCU |
| HT95AXXX | I/O Type Phone 8-Bit MCU |
| HT95C20P | 8-Bit CID Type Phone Controller MCU |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT95A400/40P | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type Phone 8-Bit MCU |
| HT95A40P | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU |
| HT95AXXX | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:I/O Type Phone 8-Bit MCU |
| HT95C200 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU |
| HT95C20P | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit CID Type Phone Controller MCU |
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