參數(shù)資料
型號(hào)： HT95C20P
廠商： Holtek Semiconductor Inc.
英文描述： 8-Bit CID Type Phone Controller MCU
中文描述： 8位偵緝型電話MCU控制器
文件頁(yè)數(shù)： 32/50頁(yè)
文件大?。?/td> 324K
代理商： HT95C20P
HT95C200/20P/300/30P
Rev. 0.10
32
October 1, 2002
Preliminary
PFD generator
Register
Label
Bits
R/W
Function
PFDC
(2EH)
3~0
RO
Unused bit, read as 0
PFDEN
4
RW
1: Enable PFD output
0: Disable PFD output, the MUSIC pin output low level.
PRES0
PRES1
5
6
RW
Bit6, 5=00: Prescaler output= PFD frequency source/1
Bit6, 5=01: Prescaler output= PFD frequency source/2
Bit6, 5=10: Prescaler output= PFD frequency source/4
Bit6, 5=11: Prescaler output= PFD frequency source/8
FPFD
7
RW
1: The PFD frequency source is 3.58MHz/4
0: The PFD frequency source is 32768Hz
PFDD
(2FH)
7~0
RW
PFD data register
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
2
(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.
WDTinstr
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 Port A
Pull-high Port B
Pull-high Port D
Pull-high Port E
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 for HT95C300/30P.
Port D pull-high option is selected per byte for HT95C200/20P.
Port E pull-high option is selected per nibble.
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相關(guān)PDF資料
PDF描述
HT95C300 8-Bit CID Type Phone Controller MCU
HT95C30P 8-Bit CID Type Phone Controller MCU
HT95C200 8-Bit CID Type Phone Controller MCU
HT95CXXX CID Type Phone 8-Bit MCU
HT95L400-128QFP-A LCD Type Phone 8-Bit MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT95C300 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU
HT95C30P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU
HT95C400 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU
HT95C40P 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU
HT95CXXX 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU
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