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參數(shù)資料
| 型號： | MMC2080 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Integrated Processor with Roaming FLEX Decoder |
| 中文描述： | 綜合處理器漫游FLEX解碼器 |
| 文件頁數(shù)： | 25/34頁 |
| 文件大?。?/td> | 768K |
| 代理商： | MMC2080 |
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Tables of Signals
Signal and Connection Descriptions
Preliminary
25
Table 10. FLEX Signals (MMC2080 Only)
Signal Name
Dir
N
I/O Cell
Description
LOBAT
In
Y
INHP
Low Battery
—
LOBAT is an input signal to indicate to the MMC2080
when external battery power is going low. (An external voltage
sensing circuit is required.) Polarity is programmable.
EXTS[1:0]
In
Y
IOHP
External Symbol
—
EXTS 1 is the MSB of the current FLEX symbol.
EXTS0 is the LSB of the current FLEX symbol. These pins are used
when demodulation is being performed externally.
CLKOUT*
O
Y
OTP
Clock Output
—
CLKOUT is programmable as a 38.4 or 40 kHz
clock output (derived from oscillator).
SYMCLK
O
Y
OTP
Recovered Symbol Clock
—
Data is synchronized to the internal
clock, and this recovered clock output enhances lock-on capability
by reducing jitter from cable-induced noise.
S[7:1]
O
Y
OTP
Control Lines
1
–
7
—
These signals are the seven additional receiver
control lines. Selectable polarity.
S0/IFIN
I/O
Y
IOHP
S0
—
This signal is a receiver control output line when the IDE bit is
clear (that is, the internal demodulator is disabled).
IFIN
—
This signal is a limited IF input when the IDE bit is set (that is,
the internal demodulator is enabled).
Table 11. FSC/SPI1 Signals
Signal Name
Dir
N
I/O Cell
Description
MPE4/LOCK
I/O
Y
IOHPPH
External Synthesizer Lock Input
—
PIO when SPI1 is disabled
MPE3/MOSI
I/O
Y
IOHPPH
Master-out / Slave-in
—
PIO when SPI1 is disabled
MPE2/MISO
I/O
Y
IOHPPH
Master-in / Slave-out
—
PIO when SPI1 is disabled
MPE1/SS
I/O
Y
IOHPPH
Slave Select
(selectable polarity)
—
PIO when SPI1 is disabled
MPE0/SCLK
I/O
Y
IOHPPH
Serial Clock
—
PIO when SPI1 is disabled
Table 12. SCI Signals
Signal Name
Dir
N
I/O Cell
Description
MPC7/URXD
I/O
Y
IOHPPH
Receive Data
—
An input when used as URXD; otherwise a PIO
MPC6/UTXD
I/O
Y
IOHPPH
Transmit Data
—
An output when used as UTXD; otherwise a PIO
MPC5/UCTS
I/O
Y
IOHPPH
Clear-to-Send
(active low)
—
An input when used as UCTS;
otherwise a PIO
MPC4/URTS
I/O
Y
IOHPPH
Request-to-Send
(active low)
—
An output when used as URTS;
otherwise a PIO
UCLK
I/O
Y
IOHPPH
UART Clock
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