參數(shù)資料
型號(hào)： SAA7780
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： ThunderBird Q3DE PCI Audio Accelerator(雷鳥 Q3DE PCI音頻加速器)
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP160
封裝： 28 X 28 MM, 3.42 MM HEIGHT, PLASTIC, QFP-160
文件頁數(shù)： 20/70頁
文件大小： 348K
代理商： SAA7780
ThunderBird Q3D PCI Audio
Accelerator
SAA7780
Philips Semiconductors
Product Specification
1999 Sep 30
20
16650 UART Interface
RXD
146
I-T
UART Serial Data Input
This pin provides the serial bit stream to the 550-compatible UART.
This input is ignored when the Loop Mode is enabled.
TXD
145
O-T
UART Serial Data Output
This pin is an output from UART, providing the serial bit stream to
external buffers or devices. This signal is forced high whenever the
transmitter is disabled, RST# is asserted, the transmit register is
empty, or the UART is in the Loop Mode.
RTS#
148
O-T
UART Request To Send
An active low output that is the inverted value of the Modem Control
Register (MCR) bit 1, as follows:
When MCR[1] = 1, RTS# is low.
When MCR[1] = 0, RTS# is high.
When RST# is asserted, RTS# is forced high.
DTR#
149
O-T
UART Data Terminal Ready
An active low output that is the inverted value of the Modem Control
Register bit 0, as follows:
When MCR[0] = 1, DTR# is low.
When MCR[0] = 0, DTR# is high.
When RST# is asserted, DTR# is forced high.
CTS#
150
I-T
UART Clear To Send
The status of this input can be determined by reading bit 4 of the
Modem Status Register. When MSR[4] is read, it will be the inverted
value of CTS#. A change in status of CTS# sets the Delta CTS bit in
the Modem Status Register.
If the CTS# line changes state while the modem status interrupts
are enabled, an interrupt packet will be generated.
DSR#
151
I-T
UART Data Set Ready
The status of this input can be determined by reading bit 5 of the
Modem Status Register. When MSR[5] is read, it will be the inverted
value of DSR#. A change in status of DSR# sets the Delta DSR bit
in the Modem Status Register.
If the DSR# line changes state while the modem status interrupts
are enabled, an interrupt will be generated.
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