XR21B1424_17 Datasheet, PDF (39/64 Pages) Exar Corporation – Enhanced 4-Ch Full-Speed USB UART

Bit
7
6
5:4
3
2
1
0
Default
Description
0
RXT
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
0
TXT
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
0
Reserved
These bits are reserved and should be written as ‘0’.
0
RS485
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
0
CTS
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
0
RTS
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
0
CLK
0: When USE_SUSPEND is ’1,’ clear this bit to a ’0’
1: When USE_SUSPEND is ’1,’ set this bit to a ’1’
XR21B1424
SUSPEND_MODE (0x06B) - Read/Write
Bit
15
14
13
12
11
10
9:8
Default
Description
0
USE_SUSPEND
0: GPIO pins will retain output state when device is suspended’
1: GPIO pins will assert state defined in SUSPEND_STATE and mode defined in SUSPEND_MODE when device is sus-
pended.
0
Reserved
This bit is reserved and should be written as ‘0’.
0
DSR
0: When USE_SUSPEND is ’1,’ output will be actively driven
1: When USE_SUSPEND is ’1,’ output will be open drain
0
DTR
0: When USE_SUSPEND is ’1,’ output will be actively driven
1: When USE_SUSPEND is ’1,’ output will be open drain
0
RI
0: When USE_SUSPEND is ’1,’ output will be actively driven
1: When USE_SUSPEND is ’1,’ output will be open drain
0
CD
0: When USE_SUSPEND is ’1,’ output will be actively driven
1: When USE_SUSPEND is ’1,’ output will be open drain
0
Reserved
These bits are reserved and should be written as ‘0’.
39 / 64
exar.com/XR21B1424
Rev 1C