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HT95C30P Datasheet(PDF) 26 Page - Holtek Semiconductor Inc |
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HT95C30P Datasheet(HTML) 26 Page - Holtek Semiconductor Inc |
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26 / 52 page  HT95LXXX Rev. 1.20 26 May 26, 2004 Phone controller also supports the dialer I/O flag to monitor the dialer status. Register Label Bits R/W Function DIALERIO (16H) HFI 0 RO 1: The HFI pin level is 1. 0: The HFI pin level is 0. HFO 1 RO 1: The HFO pin level is 1. 0: The HFO pin level is 0. HDI 2RO Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P, HT95L100/10P 1: The HDI pin level is 1. 0: The HDI pin level is 0. HDO 3 RO Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P, HT95L100/10P 1: The HDO pin level is 1. 0: The HDO pin level is 0. HKS 4RO 1: The HKS pin level is 1. 0: The HKS pin level is 0. SPO 5 RW 1: The PO pin is controlled by the combination of the HKS, HFI and HDI pin. 0: The PO pin level is set to 0 by software. SDNPO 6 RW 1: The DNPO pin level is set to floating by software. 0: The DNPO pin level is set to 0 by software. XMUTE 7RW 1: The XMUTE pin is set to floating by software. 0: The XMUTE pin is set to 0 by software. The SPO flag is special designed to control the PO. When the flag SPO is set to 1, the PO pin is controlled by the combi- nation of the HKS pin, HFI pin and HDI pin. The PO pin will always be 0 if the flag SPO=0. The relation between the Dialer I/O function (SPO=1) Dialer Function Dialer I/O Pin (Flag) Status Result HKS HFO HDO PO DNPO Telephone Line On-hook 1 0 0 0 floating break On-hook & Hand-free 1 1 0 1 floating make On-hook & Hold-line 1 0 1 1 floating make Off-hook 0 0 0 1 floating make Off-hook & Hand-free 0 1 0 1 floating make Off-hook & Hold-line 0 0 1 1 floating make The following describes the dialer I/O function status machine figure (Available on Normal mode, Green mode or Sleep mode): O n - h o o k O f f - h o o k O n - h o o k H F I H F I H D I H F I H D I O f f - h o o k O n - h o o k H D I H F I O f f - h o o k H D I O f f - h o o k H a n d - f r e e O n - h o o k H a n d - f r e e O f f - h o o k H o l d - l i n e O n - h o o k H o l d - l i n e O n - h o o k O f f - h o o k H D I Note: 1. If the dialer status is on-hook and hold-line, the falling edge transition onto HDI pin will not generate the dialer I/O interrupt. 2. Dialer I/O function is not available in Idle mode Off-hook: A falling edge to HKS pin On-hook: A rising edge to HKS pin HFI: A high pulse to HFI pin (Hand-free request is generated.) HDI: A low pulse to HDI pin (Hold-line request is generated.) |
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