CS5460-BS 查看數據表（PDF） - Cirrus Logic
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CS5460-BS Datasheet PDF : 34 Pages
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CS5460
6. PIN DESCRIPTION
Crystal Out
XOUT 1
CPU Clock Output CPUCLK 2
Positive Digital Supply
VD+ 3
Digital Ground
DGND 4
Serial Clock Input
SCLK 5
Serial Data Output
SDO 6
Chip Select
CS 7
No Connect
NC 8
Differential Voltage Input
VIN+ 9
Differential Voltage Input
VIN- 10
Voltage Reference Output VREFOUT 11
Voltage Reference Input VREFIN 12
24 XIN
23 SDI
22 EDIR
21 EOUT
20 INT
19 RESET
18 NC
17 PFMON
16 IIN+
15 IIN-
14 VA+
13 VA-
Crystal In
Serial Data Input
Energy Direction Indicator
Energy Output
Interrupt
Reset
No Connect
Power Fail Monitor
Differential Current Input
Differential Current Input
Positive Analog Supply
Analog Ground
Clock Generator
Crystal Out
Crystal In
1,24 XOUT, XIN - A gate inside the chip is connected to these pins and can be used with a
crystal to provide the system clock for the device. Alternatively, an external (CMOS
compatible clock) can be supplied into 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
SCLK
5 Serial Clock Input - A clock signal on this pin determines the input and output rate of the
data for the SDI and SDO pins respectively. This input is a Schmitt trigger to allow for
slow rise time signals. The SCLK pin will recognize clocks only when CS is low.
SDO
6 Serial Data Output - SDO is the output pin of the serial data port. Its output will be in a
high impedance state when CS is high.
CS
7 Chip Select - When active low, the port will recognize SCLK. An active high on this pins
puts the SDO pin in a high impedance state. CS should be changed when SCLK is low.
INT
20 Interrupt - When INT goes low it signals that an enabled event has occurred. INT is
cleared (logic 1) by writing the appropriate command to the CS5460.
EOUT
21 Energy Output - The energy output pin output a fixed-width pulse rate output with a rate
(programmable) proportional to energy.
EDIR
22 The energy direction indicator indicates if the measured energy is negative.
SDI
23 Energy Direction Indicator - Serial Data Input - SDI is the input pin of the serial data
port. Data will be input at a rate determined by SCLK.
Measurement and Reference Input
Differential
Voltage Inputs
9,10 VIN+, VIN- - Differential analog input pins for voltage channel.
Voltage
Reference Output
11 VREFOUT - The on-chip voltage reference is output from this pin. The voltage reference
has a nominal magnitude of 2.5 V and is reference to the VA- pin on the converter.
Voltage
Reference Input
12 VREFIN - The voltage input to this pin establishes the voltage reference for the on-chip
modulator.
DS279PP5
31
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