REV. 1.0.4 HIGH PERFORMANCE OCTAL PCI EXPRESS UART 3.4 Internal Loopback Each UART channel provides an internal loopb" />
參數(shù)資料
型號(hào)： XR17V358IB-E8-EVB
廠商： Exar Corporation
文件頁數(shù)： 36/68頁
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR17V358-E8
產(chǎn)品培訓(xùn)模塊： PCIe UARTs
UART Product Overview
標(biāo)準(zhǔn)包裝： 1
主要目的： 接口，UART
嵌入式： 否
已用 IC / 零件： XR17V358
已供物品： 板
相關(guān)產(chǎn)品： 1016-1294-ND - IC UART PCIE OCTAL 176FPBGA
其它名稱： 1016-1296
XR17V358
41
REV. 1.0.4
HIGH PERFORMANCE OCTAL PCI EXPRESS UART
3.4
Internal Loopback
Each UART channel provides an internal loopback capability for system diagnostic. The internal loopback
mode is enabled by setting MCR register bit [4] to a logic 1. All regular UART functions operate normally.
Figure 12 shows how the modem port signals are re-configured. Transmit data from the transmit shift register
output is internally routed to the receive shift register input allowing the system to receive the same data that it
was sending. The TX pin is held at HIGH or mark condition while RTS# and DTR# are de-asserted. The CTS#,
DSR#, CD# and RI# inputs are ignored.
FIGURE 12. INTERNAL LOOP BACK
T X [7 :0 ]
R X [7 :0 ]
Mode
m
/
Genera
l
P
u
rpo
s
e
Contro
l
Lo
gic
Inter
n
al
B
u
s
Lines
an
d
C
ontr
ol
S
ignal
s
R T S # [7 :0 ]
M C R bit-4=1
VC C
Tran sm it S h ift
R egiste r
R e ce ive S h ift
Re g is te r
C T S # [7 :0 ]
D T R # [7 :0 ]
D S R # [7 :0 ]
R I# [7 :0 ]
CD# [7 :0 ]
OP 1 #
OP 2 #
RT S #
CT S #
DT R#
DS R#
RI#
CD#
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