參數(shù)資料
型號(hào)： HT95C30P
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)： 23/50頁(yè)
文件大?。?/td> 324K
代理商： HT95C30P
HT95C200/20P/300/30P
Rev. 0.10
23
October 1, 2002
Preliminary
The flag DOUTC presents the output of the decoder
when the decoder is at operation mode. This data
stream is like the DOUT flag but does not include the al-
ternate 1 and 0 pattern.
If the FSK data is not detected, the DOUT and DOUTC
are held high.
Beside the serial data, the decoder also provides FSK
packet data. When decoder receives an FSK signal, it
will packet 10 bits data to 8 bits data, the first and 10th
bits will be discarded. When the 8-bit packet data is
valid, it will be stored in the FSK data register FSKD, the
FSK packet data interrupt flag FSKF will be set to 1. This
may cause a peripheral interrupt if FMSK is 0 and the
peripheral interrupt is enabled. The FSK packet source
could be DOUT or DOUTC, selected by FSKSEL. Note
that the start bit of the 10 packet bit should be 0, so the
MARK signal (one of the FSK data signals) will not be
packeted.
To detect the carrier signal or decode the serial data or
packet 10-bit data to 8-bit data, the operation mode of
the controller must be selected in Normal mode (proces-
sor running with 3.58MHz). When the operation mode is
Green or Sleep, FSK decoder will decode the wrong sig-
nal. However, when the operation mode is Green or
Sleep mode and the FSK decoder is at power down
mode (F_PWDN=1), the ring and line reversal detect is
still functional.
DTMF generator
The DTMF (Dual Tone Multiple-Frequency) signal gen-
erator is implemented in the telephone controller. It can
generate 16 dual tones and 8 single tones from the
DTMF pin. This generators also support power down,
tone on/off, burst mode function. The DTMF generator
clock source is 3.58MHz, before using this function, the
system operation mode must be at Normal mode.
The generator supports one interrupt source to the pe-
ripheral interrupt vector, namely DTMF burst-cycle inter-
rupt. Write 0 to the control flag, BMSK will enable this
interrupt. When the DTMF generator finishes 1
burst-cycle, the interrupt flag BURSTF will be set to 1 by
hardware even if the interrupt is disabled. This interrupt
willcauseaperipheralinterruptiftheperipheralinterrupt
is enabled. When the peripheral interrupt occurs, the in-
terrupt request flag PERF will be set and a subroutine
call to location 10H will occur. Return from the interrupt
subroutine, the interrupt flag BURSTF will not be
cleared by hardware, the user could clear it by software
if necessary. If this flag is not cleared, next burst inter-
rupt will occur.
The power down mode (D_PWDN=1) will terminate all
the DTMF generator function, however, the registers
DTMFC and DTMFD are accessible at this power down
mode.
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Note: *: If the flag FSKSEL=1, the sync signal data will not be packeted.
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