W83627EG Nuvoton Technology Corporation of America, W83627EG Datasheet - Page 161

• Manufacturer Part Number: W83627EG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.4
This register reflects the current state of the four input pins used with handshake peripherals such as
modems 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 mode.
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 mode.
Bit 4: This bit is the opposite of the CTS# input. This bit is equivalent to bit 1 of HCR in loopback mode.
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 after HSR was read by
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 by the CPU.
the CPU.
Handshake Status Register (HSR) (Read/Write)
7
6
5
4
3
2
W83627EHF/EF, W83627EHG/EG
1
- 150 -
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)