Preliminary Technical Data
AD73560
P IN F U NC T IO N D E SC R IP T IO N
Mnem onic
Function
VIN P1
VIN N 1
VIN P2
VIN N 2
VIN P3
VIN N 3
VIN P4
VIN N 4
VIN P5
VIN N 5
VIN P6
VIN N 6
R E F O U T
Analog Input to the Positive T erminal of Input Channel 1.
Analog Input to the Negative T erminal of Input Channel 1.
Analog Input to the Positive T erminal of Input Channel 2.
Analog Input to the Negative T erminal of Input Channel 2.
Analog Input to the Positive T erminal of Input Channel 3.
Analog Input to the Negative T erminal of Input Channel 3.
Analog Input to the Positive T erminal of Input Channel 4.
Analog Input to the Negative T erminal of Input Channel 4.
Analog Input to the Positive T erminal of Input Channel 5.
Analog Input to the Negative T erminal of Input Channel 5.
Analog Input to the Positive T erminal of Input Channel 6.
Analog Input to the Negative T erminal of Input Channel 6.
Buffered Reference Output, which has a nominal value of 1.25 V. T his pin can be overdriven by an
external reference if required.
RE F C AP
A Bypass Capacitor to AGND2 of 0.1 µF is required for the on-chip reference. T he capacitor should be
fixed to this pin.
AVD D
AG N D
D G N D
D VD D
ARE SE T
Analog Power Supply Connection.
Analog Ground/Substrate Connection.
Digital Ground/Substrate Connection.
D igital Power Supply Connection.
Active Low Reset Signal. T his input resets the entire chip, resetting the control registers and clearing the
digital circuitry.
SC LK 2
Output Serial Clock whose rate determines the serial transfer rate to/from the AFE0. It is used to
clock data or control information to and from the serial port (SPORT 2). T he frequency of SCLK is
equal to the frequency of the master clock (MCLK) divided by an integer number—this integer number
being the product of the external master clock rate divider and the serial clock rate divider.
Master Clock Input. MCLK is driven from an external clock signal.
Serial Data Output of the AD73560. Both data and control information may be output on this pin and are
clocked on the positive edge of SCLK. SDO is in three-state when no information is being transmitted and
when SE is low.
M C L K
SD O
SD OFS
SD IFS
Framing Signal Output for SDO Serial T ransfers. T he frame sync is one bit wide and it is active one SCLK
period before the first bit (MSB) of each output word. SDOFS is referenced to the positive edge of SCLK.
SDOFS is in three-state when SE is low.
Framing Signal Input for SDI Serial T ransfers. T he frame sync is one bit wide and it is valid one SCLK period
before the first bit (MSB) of each input word. SDIFS is sampled on the negative edge of SCLK and is ignored
when SE is low.
SD I
SE
Serial Data Input of the AD73560. Both data and control information may be input on this pin and are clocked
on the negative edge of SCLK. SDI is ignored when SE is low.
SPORT Enable. Asynchronous input enable pin for the SPORT . When SE is set low by the DSP, the output
pins of the SPORT are three-stated and the input pins are ignored. SCLK is also disabled internally in order to
decrease power dissipation. When SE is brought high, the control and data registers of the SPORT are at their
original values (before SE was brought low); however, the timing counters and other internal registers are at
their reset values.
RESET
BR
(Input) Processor Reset Input
(Input) Bus Request Input
BG
(Output) Bus Grant Output
BG H
D M S
PM S
IOM S
BM S
C M S
RD
(Output) Bus Grant Hung Output
(Output) Data Memory Select Output
(Output) Program Memory Select Output
(Output) Memory Select Output
(Output) Byte Memory Select Output
(Output) Combined Memory Select Output
(Output) Memory Read Enable Output
WR
(Output) Memory Write Enable Output
IRQ2/
PF7
(Input) Edge- or Level-Sensitive Interrupt
(Input/Output) Request.1 Programmable I/O Pin
REV. PrA
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