參數(shù)資料
型號: ST16C552
廠商: Exar Corporation
英文描述: Dual UART with 16-Byte FIFO and Parallel Printer Port(雙通用異步接收器/發(fā)送器(帶16字節(jié)的先進(jìn)先出和并行打印機(jī)端口))
中文描述: 雙UART),16字節(jié)FIFO和并行打印機(jī)端口(雙通用異步接收器/發(fā)送器(帶16字節(jié)的先進(jìn)先出和并行打印機(jī)端口)
文件頁數(shù): 10/40頁
文件大?。?/td> 463K
代理商: ST16C552
10
ST16C552/552A
Rev. 3.30
Table 4, INTERNAL REGISTER DECODE
A2
A1
A0
READ MODE
WRITE MODE
General Register Set (THR/RHR, IER/ISR, MCR/MSR, LCR/LSR, SPR): Note 1*
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Receive Holding Register
Transmit Holding Register
Interrupt Enable Register
FIFO Control Register
Line Control Register
Modem Control Register
Interrupt Status Register
Line Status Register
Modem Status Register
Scratchpad Register
Scratchpad Register
Baud Rate Register Set (DLL/DLM): Note *2
0
0
0
0
0
1
LSB of Divisor Latch
MSB of Divisor Latch
LSB of Divisor Latch
MSB of Divisor Latch
Printer Port Set (PR/SR/IOSEL/COM/CON): Note *3
X
X
X
0
0
1
0
1
0
PORT REGISTER
STATUS REGISTER
COMMAND REGISTER
PORT REGISTER
I/O SELECT REGISTER
CONTROL REGISTER
Note 1* The General Register set is accessible only when CS A or CS B is a logic 0.
Note 2* The Baud Rate register set is accessible only when CS A or CS B is a logic 0 and LCR bit-7 is a logic 1.
Note 3*: Printer Port Register set is accessible only when -CSP is a logic 0 in conjunction with the states of the
interface signal BIDEN and Printer Control Register bit-5 or IOSEL register.
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