參數(shù)資料
型號(hào): XR16C850CQ
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: UART with 128-byte FIFO’s FIFO Counters and Half-duplex Control
中文描述: 1 CHANNEL(S), 2.25M bps, SERIAL COMM CONTROLLER, PQFP52
封裝: QFP-52
文件頁(yè)數(shù): 5/55頁(yè)
文件大?。?/td> 331K
代理商: XR16C850CQ
XR16C850
5
Rev. 1.20
A0
28
31
28
31
I
Address-0 Select Bit - Internal registers address
selection in PC and STD modes.
A1
27
30
27
30
I
Address-1 Select Bit Internal registers address
selection in PC and STD modes
A2
26
29
26
29
I
Address-2 Select Bit Internal registers address
selection in PC and STD modes
A3 / IOR
22
25
20
22
I
Address-3 Select Bit or Input/Output Read (dual
function) - When the PC mode is selected, this pin
is used as 4th address line to decode the COM1-4
and LPT ports. During STD mode operation this pin
is used as Read strobe. Its function is the same as
-IOR (see -IOR), except it is active high. Either an
active -IOR or IOR is required to transfer data from
850 to CPU during a read operation. Connect this
pin to GND when –IOR is used.
A4
-
12
6
6
I
Address-4 Select Bit (internal pull-up) - When the
PC mode is selected, this pin is used as 5th address
line to decode the COM1-4 and LPT ports. This pin
has no function in the STD mode.
A5 / CS0
12
14
9
9
I
Address-5 Select Bit or Chip Select-0 (dual function)
- When the PC mode is selected, this pin is used as
6th address line to decode the COM1-4 and LPT
ports. During STD mode a logical 1 on this pin
provides the chip select 0 function. Connect this pin
to VCC when CS1 or –CS2 is used.
A6 / CS1
13
15
10
10
I
Address-6 Select Bit or Chip Select-1 (dual function)
- When the PC mode is selected, this pin is used as
7th address line to decode the COM1-4 and LPT
ports. During STD mode a logical 1 on this pin
provides the chip select 1 function. Connect this pin
to VCC when CS0 or –CS2 is used.
A7 / -CS2
14
16
11
7
I
Address-7 Select Bit or Chip Select -2 (dual func-
tion) - When the PC mode is selected, this pin is
used as 8th address line to decode the COM1-4 and
LPT ports. During STD mode a logical 1 on this pin
provides the chip select 2 function. Connect this pin
Symbol
Pin
Signal
type
Pin Description
40
44
48
52
SYMBOL DESCRIPTION
相關(guān)PDF資料
PDF描述
XR16C850 UART with 128-byte FIFO’s FIFO Counters and Half-duplex Control
XR16C854 QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854CJ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854CQ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854CV QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
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