參數(shù)資料
型號(hào): XR17D152CM
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
中文描述: 2 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP100
封裝: 14 X 14 MM, 1 MM HEIGHT, TQFP-100
文件頁(yè)數(shù): 5/68頁(yè)
文件大?。?/td> 772K
代理商: XR17D152CM
á
REV. 1.2.0
XR17D152
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
5
N
OTE
:
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
TMRCK
75
I
16-bit timer/counter external clock input.
ENIR
74
I
Global Infrared mode enable (active high). This pin is sampled during power
up, following a hardware reset (RST#) or soft-reset (register RESET). It can
be used to start up both UARTs in the infrared mode. The sampled logic state
is transferred to MCR bit-6 in the UART. Software can override this pin there-
after and enable or disable it.
Global AutoRS485 half-duplex direction control enable (active low). During
power up or reset, this pin is sampled and if it is a logic high, both UARTs are
set for Auto RS485 Mode. Also, the Auto RS485 bit, FCTR[5], is set in both
channels. Software can override this pin thereafter and enable or disable it.
EN485#
65
I
TEST#
79
I
Factory Test. Connect to VCC for normal operation.
VCC
54, 80
PWR
5V or 3.3V power supply for the core logic. This power supply determines
the VOH level of the non-PCI bus interface outputs. Note that
VCC
VIO
for
normal device operation.
See “Application Examples” on page 7.
However,
VCC must equal VIO
if sleep mode is used
.
See
Sleep Mode
section on
page 18
.
VIO
10, 22, 32, 43,
89, 100
PWR
PCI bus I/O power supply - 3.3V or 5V, detected by the auto-sense circuitry of
the XR17D152. This power supply determines the VOH level of the PCI bus
interface outputs.
(PCI 2.3 signalling compliant at both 3.3V and 5V operation, suitable for uni-
versal form factor add-in card application.)
GND
1, 11, 23, 33,
44, 53, 78, 88
PWR
Power supply common, ground.
NC
63, 64
No Connection.
PIN DESCRIPTIONS
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
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