CS5463-IS Просмотр технического описания (PDF) - Cirrus Logic
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CS5463-IS Datasheet PDF : 46 Pages
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CS5463
2. PIN DESCRIPTION
Crystal Out
XOUT 1
CPU Clock Output CPUCLK 2
Positive Digital Supply
VD+ 3
Digital Ground
DGND 4
Serial Clock
SCLK 5
Serial Data Ouput
SDO 6
Chip Select
CS 7
Mode Select
MODE 8
Differential Voltage Input
VIN+ 9
Differential Voltage Input
VIN- 10
Voltage Reference Output VREFOUT 11
Voltage Reference Input VREFIN 12
24
XIN
Crystal In
23
SDI
Serial Data Input
22
E2
Energy Output 2
21
E1
Energy Output 1
20
INT
Interrupt
19
RESET Reset
18
E3
High Frequency Energy Output
17
PFMON Power Fail Monitor
16
IIN+
Differential Current Input
15
IIN-
Differential Current Input
14
VA+ Positive Analog Supply
13
AGND Analog Ground
Clock Generator
Crystal Out
Crystal In
1,24
XOUT, XIN – The output and input of an inverting amplifier. Oscillation occurs when connected to
a crystal, providing an on-chip system clock. Alternatively, an external clock can be supplied to
the XIN pin to provide the system clock for the device.
CPU Clock Output
2 CPUCLK – Output of on-chip oscillator which can drive one standard CMOS load.
Control Pins and Serial Data I/O
Serial Clock Input
5 SCLK – A Schmitt-trigger input pin. Clocks data from the SDI pin into the receive buffer and out
of the transmit buffer onto the SDO pin when CS is low.
Serial Data Output
6 SDO – Serial port data output pin.SDO is forced into a high-impedance state when CS is high.
Chip Select
7 CS – Low, activates the serial port interface.
Mode Select
8 MODE - High, enables the “auto-boot” mode. The mode pin has an internal pull-down resistor.
Energy Output
18,21,22 E3, E1, E2 – Active-low pulses with an output frequency proportional to the selected power. Con-
figurable outputs for active, apparent, and reactive power, negative energy indication, zero cross
detection, and power failure monitoring. E1, E2, E3 outputs are configured in the Operational
Modes Register.
Reset
19 RESET – A Schmitt-trigger input pin. Low activates Reset, all internal registers (some of which
drive output pins) are set to their default states.
Interrupt
20 INT - Low, indicates that an enabled event has occurred.
Serial Data Input
23 SDI - Serial port data input pin. Data will be input at a rate determined by SCLK.
Analog Inputs/Outputs
Differential Voltage Inputs 9,10 VIN+, VIN- – Differential analog input pins for the voltage channel.
Differential Current Inputs 15,16 IIN+, IIN- – Differential analog input pins for the current channel.
Voltage Reference Output
11 VREFOUT – The on-chip voltage reference output. The voltage reference has a nominal magni-
tude of 2.5 V and is referenced to the AGND pin on the converter.
Voltage Reference Input
12 VREFIN – The input to this pin establishes the voltage reference for the on-chip modulator.
Power Supply Connections
Positive Digital Supply
3 VD+ – The positive digital supply.
Digital Ground
4 DGND – Digital Ground.
Positive Analog Supply
14 VA+ – The positive analog supply.
Analog Ground
13 AGND – Analog ground.
Power Fail Monitor
17 PFMON – The power fail monitor pin monitors the analog supply. If the analog supply does not
meet or falls below PFMON’s voltage threshold, a Low-supply Detect (LSD) event is set in the
status register.
6
DS678F2
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