REV. 1.0.2 Pin type: I=Input, O=Output, I/O= Input/output, OD=Output" />
參數資料
型號: XR16M2651IM48-F
廠商: Exar Corporation
文件頁數: 48/51頁
文件大?。?/td> 0K
描述: IC UART FIFO 32B DUAL 48TQFP
標準包裝: 250
特點: *
通道數: 2,DUART
FIFO's: 32 字節(jié)
規(guī)程: RS232,RS422
電源電壓: 1.62 V ~ 3.63 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調制解調器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應商設備封裝: 48-TQFP(7x7)
包裝: 托盤
XR16M2651
6
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
REV. 1.0.2
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
16/68#
17
24
I
Intel or Motorola Bus Select.
When 16/68# pin is HIGH, 16 or Intel Mode, the device will operate in the Intel bus
type of interface.
When 16/68# pin is LOW, 68 or Motorola mode, the device will operate in the
Motorola bus type of interface.
CLKSEL
-
25
I
Baud-Rate-Generator Input Clock Prescaler Select for channel A and B. This input
is only sampled during power up or a reset. Connect to VCC for divide by 1 and
GND for divide by 4. MCR[7] can override the state of this pin following a reset or
initialization. See MCR bit-7 and
Figure 5 in the Baud Rate Generator section.
RESET
(RESET#)
24
36
I
When 16/68# pin is HIGH for Intel bus interface, this input becomes RESET (active
high). When 16/68# pin is LOW for Motorola bus interface, this input becomes
RESET# (active low).
A 40 ns minimum active pulse on this pin will reset the internal registers and all out-
puts of channel A and B. The UART transmitter output will be held HIGH, the
receiver input will be ignored and outputs are reset during reset period (see
VCC
26
42
Pwr 1.62V to 3.63V power supply.
GND
13
17
Pwr Power supply common ground.
GND
Center
Pad
N/A
Pwr The center pad on the backside of the 32-QFN package is metallic and should be
connected to GND on the PCB. The thermal pad size on the PCB should be the
approximate size of this center pad and should be solder mask defined. The solder
mask opening should be at least 0.0025" inwards from the edge of the PCB ther-
mal pad.
NC
-
37
-
No connection.
Pin Description
NAME
32-QFN
PIN #
48-TQFP
PIN #
TYPE
DESCRIPTION
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