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71M6515H Datasheet, PDF (8/57 Pages) Teridian Semiconductor Corporation – Energy Meter IC | |||
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71M6515H
Energy Meter IC
Analog Pin Description
DATA SHEET
MARCH 2008
Name
IA,
IB,
IC
VA,
VB,
VC
VFLT
VX
VREF
XIN,
XOUT
Pin
No.
Type Circuit Description
56
55
I
Line Current Sense Inputs: Voltage inputs to the internal A/D converter. Typically,
6
they are connected to the output of a current transformer. The input is referenced
54
to V3P3A. Unused pins must be tied to V3P3A.
53
Line Voltage Sense Inputs: Voltage inputs to the internal A/D converter. Typically,
52
I
6
they are connected to the output of a resistor divider. The input is referenced to
51
V3P3A. Unused pins must be tied to V3P3A.
59
I
7
Power Fault Input. This pin must be tied to V3P3A.
58
I
6
Auxiliary input (not used). This pin should be tied to VREF.
57
I/O
9
Voltage Reference for the ADC.
61
63
I
Crystal Inputs: A 32768Hz crystal should be connected across these pins.
8
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 âI/O Equivalent Circuitsâ.
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
D0
D1
D2
D3
D4
D5
D6
D7
PULSE4
PULSE3
PULSE_INIT
BAUD_RATE
IRQZ
MUXSYNC
RESETZ
6
I/O
4
Clock PLL output. Can be enabled and disabled by CKOUT_DSB (see
Status Mask).
42
21
22
Input/output pins 0 through 7. These pins must be terminated to
23
37
I/O
3, 4
V3P3D or ground if configured as input pins.
D0 through D7 float after reset or power-up and are configured as
38
outputs and driven low 140ms after RESETZ goes high.
39
33
15
O
4
The fourth pulse generator output
14
O
4
The third pulse generator output
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.
16
I
3
The UART baud rate (1: 38.4kbd, 0: 19.2kbd). This pin must be
terminated to V3P3D or ground.
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.
25
O
4
Internal signal. MUXSYNC falls at the beginning of each conversion
cycle (multiplexer frame).
Chip reset: Input pin with internal pull-up resistor, used to reset the chip
47
I
1
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.
Page: 8 of 57
© 2005-2008 TERIDIAN Semiconductor Corporation
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