參數(shù)資料
型號: ST16C454IJ68TR-F
廠商: Exar Corporation
文件頁數(shù): 2/29頁
文件大?。?/td> 0K
描述: IC UART QUAD 68PLCC
標準包裝: 250
特點: *
通道數(shù): 4,QUART
FIFO's: 1 字節(jié)
電源電壓: 2.97 V ~ 5.5 V
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: 68-LCC(J 形引線)
供應商設備封裝: 68-PLCC
包裝: 帶卷 (TR)
ST16C454
10
Rev. 3.31
Internal Registers
The 454 provides 12 internal registers for monitoring and
control. These resisters are shown in Table 4 below.
These registers are similar to those already available in
the standard 16C450. These registers function as data
holding registers (THR/RHR), interrupt status and con-
Table 4, INTERNAL REGISTER DECODE
A2
A1
A0
READMODE
WRITE MODE
General Register Set (THR/RHR, IER/ISR, MCR/MSR, LCR/LSR, SPR):
0
Receive Holding Register
Transmit Holding Register
0
1
Interrupt Enable Register
0
1
0
Interrupt Status Register
0
1
Line Control Register
1
0
Modem Control Register
1
0
1
Line Status Register
1
0
Modem Status Register
1
Scratchpad Register
Baud Rate Register Set (DLL/DLM): Note *2
0
LSB of Divisor Latch
0
1
MSB of Divisor Latch
Note *2: These registers are accessible only when LCR bit-7 is set to a logic 1.
trol registers (IER/ISR), line status and control registers
(LCR/LSR), modem status and control registers (MCR/
MSR), programmable data rate (clock) control registers
(DLL/DLM), and a user assessable scratchpad register
(SPR). Register functions are more fully described in
the following paragraphs.
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