Rainbow Electronics W90N745CDG - Manual (Page 291)

W90N745CD/W90N745CDG
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HSUART Modem Status Register (HSUART_MSR)
REGISTER OFFSET R/W DESCRIPTION RESET VALUE
HSUART_MSR 0x18 R MODEM Status Register (Optional) 0x0000_0000
31 30 29 28 27 26 25 24
Reserved
23 22 21 20 19 18 17 16
Reserved
15 14 13 12 11 10 9 8
Reserved
7 6 5 4 3 2 1 0
Reserved CTS# Reserved DCTS
BITS DESCRIPTIONS
[31:5] Reserved -
[4] CTS#
Complement version of clear to send (CTS#) input
(This bit is selected by IP)
[3:1] Reserved -
[0] DCTS
CTS# State Change
(This bit is selected by IP)
This bit is set whenever CTS# input has changed state, and it will be reset if
the CPU reads the MSR.
Whenever any of MSR [0] is set to logic 1, a Modem Status Interrupt is generated if IER[3]=1. Writing
MSR is a null operation (not suggested).