参数资料
型号: PC87393F-VJG
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 外设及接口
英文描述: 100-Pin LPC SuperI/O Devices for Portable Applications
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封装: TQFP-100
文件页数: 49/148页
文件大小: 1733K
代理商: PC87393F-VJG
9.0 Device Characteristics (Continued)
142
www.national.com
9.4.5
Serial Port, Sharp-IR, SIR and Consumer Remote Control Timing
Symbol
Parameter
Conditions
Min
Max
Unit
tBT
Single Bit Time in Serial Port and Sharp-IR
Transmitter
tBTN 25
1
1. tBTN is the nominal bit time in Serial Port, Sharp-IR, SIR and Consumer Remote Control modes. It is deter-
mined by the setting of the Baud Generator Divisor registers
tBTN +25
ns
Receiver
tBTN 2%
tBTN +2%
ns
tCMW
Modulation Signal Pulse Width in Sharp-IR
and Consumer Remote Control
Transmitter
tCWN 25
2
2. tCWN is the nominal pulse width of the modulation signal for Sharp-IR and Consumer Remote Control modes. It
is determined by the MCPW eld (bits 7-5) of the IRTXMC registerand the TXHSC bit (bit 2) of the
RCCFG register
tCWN +25
ns
Receiver
500
ns
tCMP
Modulation Signal Period in Sharp-IR and
Consumer Remote Control
Transmitter
tCPN 25
3
3. tCPN is the nominal period of the modulation signal for Sharp-IR and Consumer Remote Control modes. It is
determined by the MCFR eld (bits 4-0) of the IRTXMC registerand the TXHSC bit (bit 2) of the RCCFG
register.
tCPN +25
ns
Receiver
tMMIN
4
4. tMMIN and tMMAX dene the time range within which the period of the incoming subcarrier signal has to fall in
order for the signal to be accepted by the receiver. These time values are determined by the contents of
the IRRXDC register and the setting of the RXHSC bit (bit 5) of the RCCFG register
tMMAX
ns
tSPW
SIR Signal Pulse Width
Transmitter,
Variable
(3/16)xtBTN 15
1 (3/
16)xtBTN + 15
ns
Transmitter,
Fixed
1.48
1.78
s
Receiver
1
s
SDRT
SIR Data Rate Tolerance.
% of Nominal Data Rate.
Transmitter
± 0.87%
Receiver
± 2.0%
tSJT
SIR Leading Edge Jitter.
% of Nominal Bit Duration.
Transmitter
± 2.5%
Receiver
± 6.5%
Serial Port
tCMW
tCMP
Sharp-IR
Consumer Remote Control
tBT
SIR
tSPW
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