參數(shù)資料
型號： ST75C530FP-A
廠商： 意法半導(dǎo)體
英文描述： SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
中文描述： 超級綜合DEVICESWITH數(shù)字信號處理器，模擬前端
文件頁數(shù)： 6/84頁
文件大小： 599K
代理商： ST75C530FP-A
II.2 - Host Interface
Theexchangeswiththe controlprocessorproceedthrougha 128x 8DUALport RAMsharedbetween the
ST75C530/540and the Host. The signals associatedwith this interfaceare :
Pin Name
Type
Description
SD0..SD7
I/O
System Data Bus. 8-bit data bus used for asynchronous exchanges between the
ST75C530/540 and the Host through the dual port RAM. High impedance when exchanges
are not active.
SA0..SA6
I
System Address Bus. 7-bit address bus for dual port RAM, IO and interruptregisters.
SDS (SRD)
I
System DataStrobe. In Motorola mode SDS initiates the exchange, active low. In Intel mode
SRD initiates a read exchange, active low.
SR/W (SWR)
I
System Read/Write. In Motorola mode SR/W defines the type of exchange read/write.In Intel
mode SWR initiates a write exchange, active low.
SCS
I
System Chip Select. Active low.
SINTR
OD
System InterruptRequest.Opendrain.Activelow.Thissignal isasserted bytheST75C530/540
and negated by the host.
RESET
I
Reset. Active low.
INT/MOT
I
Select Intelor Motorola Interface
II.3 - AnalogInterface
Pin Name
TxA1
TxA2
RxA
SPK1P
Type
O
O
I
O
Description
Transmit Analog Output 1
Transmit Analog Output 2
Receive Analog Input
Speaker Output 1, (differential positive), must be connected through Amplifier to the
loudspeaker.
Speaker Output 1, (differential negative)
Speaker Output 2, (differential positive), must be connected through Amplifier to the Handset
loudspeaker.
Speaker Output 2, (differential negative)
Speaker Output 3, (differential positive)
Speaker Output 3, (differential negative)
Microphone Input 1
Microphone Input 2
Microphone Input 3
Analog CommonVoltage (nominal+2.5V).This inputmustbedecoupledwithrespecttoAGND.
Analog Negative Reference (nominal 1.25V). This input must be decoupled with respect to
V
CM
.
Analog PositiveReference (nominal3.75V). This input mustbe decoupled withrespectto V
CM
.
SPK1N
SPK2P
O
O
SPK2N
SPK3P
SPK3N
MIC1
MIC2
MIC3
V
CM
V
REFN
O
O
O
I
I
I
I/O
I
V
REFP
I
II.4 - GeneralPurpose IO and Relay
Pin Name
GIO[0,7]
GIO[10,17]
RELAY0,
RELAY1
RING
Type
I/O
I/O
OD
Description
General Purpose I/O Pins, can be independently selected as input or output.
General Purpose I/O Pins, can be independently selected as input or output.
Relay Outputs, Open Drain, Active Low. Can sink -10mA to RGND.
I
Ring detectsignal. Activelow.Ifthe ST75C530/540isinlow powermode,alowlevelwillawake
the chip. Thisinput is a Schmidt’s trigger.
Relay Digital Ground. To connect to GND.
RGND
PWR
II - PIN DESCRIPTION
(continued)
ST75C530 - ST75C540
6/84
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