参数资料
型号: MCP2120-I/P
厂商: Microchip Technology
文件页数: 35/36页
文件大小: 0K
描述: IC ENCODER/DECODR INFRARED 14DIP
标准包装: 30
类型: 红外线编码器/解码器
电压 - 电源,模拟: 2.5 V ~ 5.5 V
电压 - 电源,数字: 2.5 V ~ 5.5 V
安装类型: 通孔
封装/外壳: 14-DIP(0.300",7.62mm)
供应商设备封装: 14-PDIP
包装: 管件
产品目录页面: 684 (CN2011-ZH PDF)
配用: MCP212XDM-ND - BOARD DEVELOPMENT IRDA
MCP2120
DS21618B-page 8
2007 Microchip Technology Inc.
2.7
Encoding/Decoding Jitter and
Offset
Figure 2-4 shows the jitter and offset that is possible on
the RX pin and the TXIR pin.
Jitter is the possible variation of the desired edge.
Offset is the propagation delay of the input signal (RXIR
or TX) to the output signal (RX or TXIR).
The first bit on the output pin (on RX or TXIR) will show
jitter compared to the input pin (RXIR or TX), but all
remaining bits will be a constant distance.
2.8
Minimizing Power
The device can be placed in a low power mode by
disabling the device (holding the EN pin at the low
state). The internal state machine is monitoring this pin
for a low level, and once this is detected the device is
disabled and enters into a low power state.
2.8.1
RETURNING TO OPERATION
When the device is disabled, the device is in a low
power state. When the EN pin is brought to a high level,
the device will return to the operating mode. The device
requires a delay of 1000 TOSC before data may be
transmitted or received.
FIGURE 2-4:
Effects of Jitter and Offset
TX Jitter
3 CLK
BITCLK
RXIR
RX
TX
TXIR
16 CLK
3 CLK
16 CLK
RX Jitter
TX Offset
RX Offset
16 CLK
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