參數(shù)資料
型號(hào): MCP2150
廠商: Microchip Technology Inc.
英文描述: DEVELOPER’S KIT USER’S GUIDE
中文描述: 開(kāi)發(fā)人員包用戶指南
文件頁(yè)數(shù): 52/64頁(yè)
文件大?。?/td> 2573K
代理商: MCP2150
MCP2120/MCP2150 USER’S GUIDE
DS51246A-page 48
2001 Microchip Technology Inc.
A.5
Oscillator Options
The MCP2120 can be operated at different frequencies, while the MCP2150
only operates at a single fixed frequency.
A.5.1
MCP2120 Developer’s Board
The MCP2120 Developer’s Board crystal has pin receptacles so that crystal
frequencies can easily be changed. Table A.1 shows the baud rates for a
given crystal frequency, based on the state of the BAUD2:BAUD0 pins.
Table A.1: Crystal Frequency / Baud Rate
A.5.2
MCP2150 Developer’s Board
The MCP2150 Developer’s Board requires a fixed frequency crystal
(11.0592 MHz).
Table A.2: Crystal Frequency / Baud Rate
BAUD1:BAUD0
Bit Rate
BAUD2:BAUD0
000
001
010
011
100
Note 1:
Bit Rate
F
OSC
/ 768
F
OSC
/ 384
F
OSC
/ 192
F
OSC
/ 128
F
OSC
/ 64
F
OSC
Frequency (MHz)
3.6864
4.9152
4800
6400
9600
12800
19200
25600
28800
38400
57600
78600
0.6144
(1)
800
1600
3200
4800
9600
2.000
2604
5208
10417
15625
31250
7.3728
9600
19200
38400
57600
115200
14.7456
(2)
20.000
(2)
19200
38400
78600
115200
230400
26042
52083
104167
156250
312500
An external clock is recommended for frequencies below 2 MHz.
For frequencies above 7.5 MHz, the TXIR pulse width (
MCP2120
Data Sheet electrical specification
parameter IR121) will be shorter than the minimum pulse width of 1.6 μs in the IrDA standard specifica-
tion.
Note 2:
F
OSC
Frequency -
11.0592 MHz
9600
19200
57600
115200
00
01
10
11
F
OSC
/ 1152
F
OSC
/ 576
F
OSC
/ 192
F
OSC
/ 96
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