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ST16C650ACJ44 bảng dữ liệu(PDF) 10 Page - Exar Corporation

tên linh kiện ST16C650ACJ44
Giải thích chi tiết về linh kiện  2.90V TO 5.5V UART WITH 32-BYTE FIFO
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Trang chủ  http://www.exar.com
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ST16C650ACJ44 bảng dữ liệu(HTML) 10 Page - Exar Corporation

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ST16C650A
áç
áç
áç
áç
2.90V TO 5.5V UART WITH 32-BYTE FIFO
REV. 5.0.0
10
2.1.1
PC MODE
The PC mode interface includes an on-chip address decoder and interrupt selection function for the standard
PC COM 1-4 port addresses. The selection is made through three input signals: S1, S2 and S3. The selection
summary is shown in Table 1. Although the on-chip address decoder was designed for PC applications ranging
from 0x278 to 0x3FF, it can fit into an embedded applications by offsetting the address lines to the 650A. An
example is shown in Figure 6 where the UART is operating from 0x80F8 to 0x80FF address space. Operating
in the PC mode eliminates external address decode components.
TABLE 1: PC MODE INTERFACE ON-CHIP ADDRESS DECODER AND INTERRUPT SELECTION.
SEL INPUT
S3, S2, S1
INPUTS
A9-A3 ADDRESS LINES TO
ON-CHIP DECODER
COM/LPT PORT
SELECTION
IRQ OUTPUT SELECTION
0
0 0 0
0x3F8 - 0x3FF
COM-1
IRQB (for PC’s IRQ4)
0
0 0 1
0x2F8 - 0x2FF
COM-2
IRQC (for PC’s IRQ3)
0
0 1 0
0x3E8 - 0x3EF
COM-3
IRQB (for PC’s IRQ4)
0
0 0 0
0x3F8 - 0x3FF
COM-4
IRQB (for PC’s IRQ4)
0
1 0 0
0x2F8 - 0x2FF
COM-1
IRQA (for PC’s IRQn
0
1 0 1
0x3E8 - 0x3EF
COM-2
IRQA (for PC’s IRQn)
0
1 1 0
0x2E8 - 0x2EF
COM-3
IRQA (for PC’s IRQn)
0
1 1 1
0x3F8 - 0x3FF
COM-4
IRQA (for PC’s IRQn)
0
- - -
0x278 - 0x27F
LPT-2
N/A
0
- - -
0x378 - 0x37F
LPT-1
N/A
FIGURE 6. PC MODE INTERFACE IN AN EMBEDDED APPLICATION.
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
A4
A5
A6
A7
A14
A15
AEN #
IO W #
IO R #
R ESET
D0
D1
D2
D3
D4
D5
D6
D7
IO W #
A0
A1
A2
R ESET
VC C
IN T
IR Q A
SEL
VC C
GN D
IO R #
IR Q B
IR Q C
A3
A4
A5
A6
A7
A8
A9
AEN *
OP 1 #
RI#
CD#
DS R#
CTS #
RX
TX
RTS #
DTR #
S1
S2
S3
VC C
GN D
GN D
E m bedded A pplication se t to operate
at address 0x 80 F 8 to 0x80F F


Số phần tương tự - ST16C650ACJ44

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1Mb / 52P
   2.90V TO 5.5V UART WITH 32-BYTE FIFO
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