W83697HFFDC Information Storage Devices, Inc, W83697HFFDC Datasheet - Page 60
W83697HFFDC
Manufacturer Part Number
W83697HFFDC
Description
LPC Interface I/o Plus Game/midi Port, Fan Control, Flash ROM I/f
Manufacturer
Information Storage Devices, Inc
Datasheet
1.W83697HFFDC.pdf
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4.2.4
This register reflects the current state of four input pins for handshake peripherals such as a modem
and records changes on these pins.
Bit 7: This bit is the opposite of the DCD input. This bit is equivalent to bit 3 of HCR in loopback
Bit 6: This bit is the opposite of the RI input. This bit is equivalent to bit 2 of HCR in loopback mode.
Bit 5: This bit is the opposite of the DSR input. This bit is equivalent to bit 0 of HCR in loopback
Bit 4: This bit is the opposite of the CTS input. This bit is equivalent to bit 1 of HCR in loopback
Bit 3: TDCD. This bit indicates that the DCD pin has changed state after HSR was read by the CPU.
Bit 2: FERI. This bit indicates that the RI pin has changed from low to high state after HSR was read
Bit 1: TDSR. This bit indicates that the DSR pin has changed state after HSR was read by the CPU.
Bit 0: TCTS. This bit indicates that the CTS pin has changed state after HSR was read.
mode.
mode.
mode.
by the CPU.
Handshake Status Register (HSR) (Read/Write)
7
6
5
4
3
2
1
- 51 -
0
Clear to send (CTS)
Data set ready (DSR)
Ring indicator (RI)
Data carrier detect (DCD)
CTS toggling (TCTS)
RI falling edge (FERI)
DCD toggling (TDCD)
DSR toggling (TDSR)
Publication Release Date: Feb. 2002
W83697HF/F
Revision 0.70
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