CS5467 데이터 시트보기 (PDF) - Cirrus Logic
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CS5467 Datasheet PDF : 46 Pages
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CS5467
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
VIN1+ 9
Differential Voltage Input
VIN1- 10
Voltage Reference Output VREFOUT 11
Voltage Reference Input VREFIN 12
Differential Voltage Input
VIN2+ 13
Differential Voltage Input
VIN2- 14
28 XIN
27 SDI
26 E2
25 E1
24 INT
23 RESET
22 E3
21 PFMON
20 IIN1+
19 IIN1-
18 VA+
17 AGND
16 IIN2+
15 IIN2-
Crystal In
Serial Data Input
Energy Output 2
Energy Output 1
Interrupt
Reset
Energy Output 3
Power Fail Monitor
Differential Current Input
Differential Current Input
Positive Analog Supply
Analog Ground
Differential Current Input
Differential Current Input
Clock Generator
Crystal Out
Crystal In
1,28 XOUT, XIN — Connect to an external quartz crystal. Alternatively, an external clock can be sup-
plied to the XIN pin to provide the system clock for the device.
CPU Clock Output
2 CPUCLK — Logic-level output from crystal oscillator. Can be used to clock an external CPU.
Control Pins and Serial Data I/O
Serial Clock
5 SCLK — Clocks serial data from the SDI pin and to the SDO pin when CS is low. SCLK is a
Schmitt-trigger input when MODE is low and a driven output when MODE is high.
Serial Data Output
6 SDO — Serial data output. Data is clocked out by SCLK.
Chip Select
7 CS — An input that enables the serial interface when MODE is low and a driven output when
MODE is high.
Mode Select
8
MODE — High selects external E2PROM, Low selects external microcontroller. MODE includes a
weak internal pull-down and therefore selects microcontroller mode if not connected.
Energy Output
22, 25, E3, E1, E2 — Primarily active-low energy pulse outputs. These can be programmed to output
26 other conditions.
Reset
23 RESET — An active-low Schmitt-trigger input used to reset the chip.
Interrupt
24 INT — Active-low output, indicates that an enabled condition has occurred.
Serial Data Input
Analog Inputs/Outputs
27 SDI — Serial data input. Data is clocked in by SCLK.
Differential Voltage Inputs
9,10
13, 14 VIN1+, VIN1-, VIN2+, VIN2- — Differential analog inputs for the voltage channels.
Differential Current Inputs
20,19,
16,15 IIN1+, IIN1-, IIN2+, IIN2- — Differential analog inputs for the current channels.
Voltage Reference Output
11 VREFOUT — The on-chip voltage reference output. Nominally 2.5 V, referenced to AGND.
Voltage Reference Input
12 VREFIN — The voltage reference input. Can be connected to VREFOUT or external 2.5 V refer-
ence.
Power Supply Connections
Positive Digital Supply
3 VD+ — The positive digital supply.
Digital Ground
4 DGND — Digital ground.
Positive Analog Supply
18 VA+ — The positive analog supply.
Analog Ground
17 AGND — Analog ground.
Power Fail Monitor
21 PFMON — Used to monitor the unregulated power supply via a resistive divider. If the PFMON
voltage drops below its low limit, the low-supply detect (LSD) bit is set in the Status register.
6
DS714F1
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