參數(shù)資料
型號(hào): MMC2075
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: MMC2075
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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