參數(shù)資料
型號(hào)： VMX1C1020
廠商： Electronic Theatre Controls, Inc.
英文描述： Versa Mix 8051 Mixed-Signal MCU
中文描述： 反之亦然混合8051混合信號(hào)微控制器
文件頁數(shù)： 39/80頁
文件大小： 3605K
代理商： VMX1C1020
VMX51C1020
_________________________________________________________________________________________________
www.ramtron.com
page 39 of 80
Using
generator, frees up Timer 1 for other uses.
The S0RELH and S0REL registers are used to
store the 10-bit reload value of the UART0 baud
rate generator.
T
ABLE
65:
(S0RELL)
S
ERIAL
P
ORT
0,
R
ELOAD
R
EGISTER
,
L
OW
B
YTE
-
SFR
96
H
7
6
5
4
S0RELL [7:0]
T
ABLE
66:
(S0RELH)
S
ERIAL
P
ORT
0,
R
ELOAD
R
EGISTER
,
H
IGH
B
YTE
-
SFR
97
H
7
6
5
4
S0RELH [15:8]
The following equations should be used to
calculate the reload value for the SOREL
register (examples follow).
Mode 3: For BAUDSRC=1
SOREL = 1024 – 2
SMOD
x f
64 x Baud Rate
the
UART0
dedicated
baud
rate
3
2
1
0
3
2
1
0
Baud Rate = 2
SMOD
x f
64 x (1024 – S0REL)
T
ABLE
67:
S
ERIAL
0
B
AUD
R
ATE
S
AMPLE
V
ALUES
BAUDSRC
=
1,
SMOD
=
1
Desired
Baud Rate
11.059 MHz
500.0 kbps
-
460.8 kbps
-
230.4 kbps
-
115.2 kbps
3FDh
57.6 kbps
3FAh
19.2 kbps
3EEh
9.6 kbps
3DCh
2.4 kbps
370h
1.2 kbps
2E0h
300 bps
-
T
ABLE
68:
S
ERIAL
0
B
AUD
R
ATE
S
AMPLE
V
ALUES
BAUDSRC
=1,
SMOD
=
0
Desired
Baud Rate
11.059 MHz
115.2 kbps
-
57.6 kbps
3FDh
19.2 kbps
3F7h
9.6 kbps
3EEh
2.4 kbps
3B8h
1.2 kbps
370h
300 bps
1C0h
S0REL @ f
clk
=
S0REL @ f
clk
=
14.75 MHz
-
3FFh
3FEh
3FCh
3F8h
3E8h
3D0h
340h
280h
-
S0REL @ f
=
S0REL @ f
clk
=
14.75 MHz
3FEh
3FCh
3F4h
3E8h
3A0h
340h
100
Timer1 can also be used as the baud rate
generator for the UART0. Set BAUDSRC to 0
and assign Timer1’s output to UART0.
When the baud rate clock source is derived from
Timer1, the baud rate and timer reload values
can be calculated using the following formulas
(examples follow).
T
ABLE
69:
E
QUATION TO CALCULATE
B
AUD
R
ATE FOR
S
ERIAL
0
Serial 0: mode 1 and 3
Mode 1: ForU0BAUD.7=0 (standard mode)
Baud Rate = 2
SMOD
x f
32 x 12 x (256-TH1)
TH1 = 256 - 2
SMOD
x f
clk____
32x12x Baud Rate
T
ABLE
70:
UART
0
B
AUD
R
ATE
S
AMPLE
V
ALUES
BAUDSRC
=0,
SMOD
=
1
Desired
Baud Rate
11.059 MHz
115.2 kbps
-
57.6 kbps
FFh
19.2 kbps
FDh
9.6 kbps
FAh
2.4 kbps
E8h
1.2 kbps
D0h
300 bps
40h
T
ABLE
71:UART
0
B
AUD
R
ATE
S
AMPLE
V
ALUES
BAUDSRC
=0,
SMOD
=
0
Desired
Baud Rate
11.059 MHz
115.2 kbps
-
57.6 kbps
-
19.2 kbps
-
9.6 kbps
FDh
2.4 kbps
F4h
1.2 kbps
E8h
300 bps
A0h
TH1 @ f
=
TH1 @ f
=
14.75 MHz
-
-
FCh
F8h
E0h
C0h
-
TH1 @ f
=
TH1 @ f
=
14.75 MHz
-
-
FEh
FCh
F0h
E0h
80h
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