Intel E3845 FH8065301487715 Data Sheet

Product codes
FH8065301487715
Page of 5308
Intel
®
 Atom™ Processor E3800 Product Family
4428
Datasheet
32.6.8
Scratchpad Register (COM1_SCR)—Offset 3FFh
Access Method
Default: 00h
1
0b
RO
Delta Data Set Ready (DDSR): 
This is used to indicate that the modem control line 
dsr_n has changed since the last time the MSR was read. '0' - no change on dsr_n since 
last read of MSR '1' - change on dsr_n since last read of MSR Reading the MSR clears 
the DDSR bit. In Loopback Mode (MCR[4] = 1), DDSR reflects changes on MCR[0] 
(DTR). Note, if the DDSR bit is not set and the dsr_n signal is asserted (low) and a reset 
occurs (software or otherwise), then the DDSR bit is set when the reset is removed if 
the dsr_n signal remains asserted. Note that PCU-UART does not implement the Data 
Set Ready (dsr_n) input.
0
0b
RO
Delta Clear to Send (DCTS): 
This is used to indicate that the modem control line 
cts_n has changed since the last time the MSR was read. '0' - no change on cts_n since 
last read of MSR '1' - change on cts_n since last read of MSR Reading the MSR clears the 
DCTS bit. In Loopback Mode (MCR[4] = 1), DCTS reflects changes on MCR[1] (RTS). 
Note, if the DCTS bit is not set and the cts_n signal is asserted (low) and a reset occurs 
(software or otherwise), then the DCTS bit is set when the reset is removed if the cts_n 
signal remains asserted. Note that PCU-UART does not implement the Clear to Send 
(cts_n) input.
Bit 
Range
Default & 
Access
Description
Type: 
I/O Register
(Size: 8 bits)
7
4
0
0
0
0
0
0
0
0
0
SC
Bit 
Range
Default & 
Access
Description
7:0
00h
RW
Scratchpad (SC): 
This register is for programmers to use as a temporary storage 
space.