參數(shù)資料
型號: XR16C872
廠商: Exar Corporation
英文描述: Dual UART with 1284 Parallel Port and Plug-and-Play(PnP) Controller(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器))
中文描述: 雙UART)與1284并行端口,插頭插即用(PnP)功能控制器(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器)
文件頁數(shù): 2/60頁
文件大?。?/td> 314K
代理商: XR16C872
XR16C872
2
Rev. P1.00
Preliminary
Figure 1. Functional Block Diagram with Plug-and-Play Interface
TXB,
RXB,
DTR#,
RTS#, etc.
To ISA Bus
To External
EEPROM
To Serial Port A
Transceivers
To Parallel
Port Printer
D0-D7
A0-A15
AEN
IOR#
IOW#
IOCHRDY
IRQ3-7,9-12,15
DREQ0,1,3,5
DACK0,1,3,5#
TC
EED
EECLK
EECS
PD0-PD7
INIT#
STROBE#
SELCTIN#
AUTOFD#
PDIR
PE
SELECT
BUSY
ACK#
ERR#
UART Channel B
(same as channel A block)
DTRA#
RTSA#
DSRA#
CTSA#
CDA#
RIA#
TXA
Modem
Interface
Transmit
FIFO
(128
bytes)
Transmit
Shift
Register
IrDA
v1.0
Encoder
RXA
Receive
FIFO
(128
bytes)
Receive
Shift
Register
IrDA v1.0
Decoder
UART Channel A
XTAL1
(22.1184
MHz)
XTAL2
Baud Rate Gen.
1284 Bi-directional
Parallel Port Controller with
Level II Electrical Interface
ISA Bus
Plug-and-Play
Controller
Divide
by 3
Osc./
Buffer
7.3728 MHz
UART
Control
Registers
RESET
I
EEPROM
Controller
To Serial Port B
Transceivers
MAN#
VCC
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