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71M6515H Datasheet(PDF) 10 Page - Teridian Semiconductor Corporation |
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71M6515H Datasheet(HTML) 10 Page - Teridian Semiconductor Corporation |
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10 / 60 page  71M6515H Energy Meter IC DATA SHEET JULY 2011 Page: 10 of 60 © 2005 −2011 Teridian Semiconductor Corporation 1.6 A Maxim Integrated Products Brand Analog Pin Description Name Pin No. Type Circuit Description IA, IB, IC 56 55 54 I 6 Line Current Sense Inputs: Voltage inputs to the internal A/D converter. Typically, they are connected to the output of a current transformer. The input is referenced to V3P3A. Unused pins must be tied to V3P3A. VA, VB, VC 53 52 51 I 6 Line Voltage Sense Inputs: Voltage inputs to the internal A/D converter. Typically, they are connected to the output of a resistor divider. The input is referenced to V3P3A. Unused pins must be tied to V3P3A. VFLT 59 I 7 Power Fault Input. This pin must be tied to V3P3A. VX 58 I 6 Auxiliary input (not used). This pin should be tied to VREF. VREF 57 I/O 9 Voltage Reference for the ADC. XIN, XOUT 61 63 I 8 Crystal Inputs: A 32768Hz crystal should be connected across these pins. Typically, a 15pF capacitor is also connected from each pin to GNDA. See the datasheet of the crystal manufacturer for details. Pin types: P = Power, O = Output, I = Input, I/O = Input/Output The circuit number denotes the equivalent circuit, as specified under “I/O Equivalent Circuits”. Digital Pin Description Unless otherwise indicated, all inputs and outputs are standard CMOS. Inputs do NOT have internal pull-ups or pull-downs. Name Pin No. Type Circuit Description CKTEST 6 I/O 4 Clock PLL output. Can be enabled and disabled by CKOUT_DSB (see Status Mask). D0 D1 D2 D3 D4 D5 D6 D7 42 21 22 23 37 38 39 33 I/O 3, 4 Input/output pins 0 through 7. These pins must be terminated to V3P3D or ground if configured as input pins. D0 through D7 are high impedance after reset or power-up and are configured as outputs and driven low 140ms after RESETZ goes high. PULSE4 15 O 4 The fourth pulse generator output PULSE3 14 O 4 The third pulse generator output PULSE_INIT 40 I 3 The pulse output initial power-up voltage (0: 0V, 1: 3.3V), default is 1. This pin must be terminated to V3P3D or ground. BAUD_RATE 16 I 3 The UART baud rate (1: 38.4kbd, 0: 19.2kbd). This pin must be terminated to V3P3D or ground. IRQZ 41 O 4 Interrupt output, low active. A falling edge indicates the end of a measurement frame, as well as alarms. Rises when status word is read. MUXSYNC 25 O 4 Internal signal. MUXSYNC falls at the beginning of each conversion cycle (multiplexer frame). RESETZ 47 I 1 Chip reset: Input pin with internal pull-up resistor, used to reset the chip into a known state. For normal operation, this pin is set to 1. To reset the chip, this pin is driven to 0 for 5 microseconds. No external reset circuitry is necessary for power-up reset. |
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