78M6612-IM/F Maxim Integrated Products, 78M6612-IM/F Datasheet - Page 85

• Manufacturer Part Number: 78M6612-IM/F
• Description: IC POWER MEASUREMENT AC 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 78M6612-IM/F

• Processor Series: 6612x
• Core: 80515
• Data Bus Width: 32 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Interface Type: UART
• Maximum Clock Frequency: 5 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 1
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN
• Development Tools By Supplier: 78M6612-DB/OMU-RF, 78M6612-DB/OMU-USB
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS_6612_001
The CE is initialized by the MPU using CECONFIG (CESTATE.). This register contains in packed form
SAG_CNT, FREQSEL, EXT_PULSE, I1_SHUNT, I2_SHUNT, PULSE_SLOW, and PULSE_FAST.
The significance of the bits in CECONFIG is shown in the table below.
The CE controls the pulse rate based on W1SUM_X + W2SUM_X (and VAR1SUM_X + VAR2SUM_X).
Note: The 78M6612 Demo Code creep function halts pulse generation.
4.4.7 CE Transfer Variables
When the MPU receives the XFER_BUSY interrupt, it knows that fresh data is available in the transfer
variables. The transfer variables can be categorized as:
1. Fundamental energy measurement variables
2. Instantaneous (RMS) values
3. Other measurement parameters
Rev. 1.2
4. Pulse generation variables
5. Current shunt variables
6. Calibration parameters
Address
CECONFIG
0x0E
CE
[15:8]
[3:2]
[bit]
[7]
[6]
[5]
[4]
[1]
[0]
CECONFIG
Name
PULSE_FAST
SENSORSEL
PULSE_SLOW
PULSESEL
SAG_CNT
Name
–
–
–
Default
0x5001
Default
(0x50)
80
11
0
0
0
0
0
0
See description of CECONFIG below.
Description
Number of consecutive voltage samples below SAG_THR
before a sag alarm is declared. The maximum value is
255. SAG_THR is at address 0x14.
Unused
Unused
Unused
Selects outlet to be used for pulse generation.
0 = A
1 = B
Current sensor selection.
00 = CT
11 = Shunt
When PULSE_SLOW = 1, the pulse generator input is
reduced by a factor of 64. When PULSE_FAST = 1, the
pulse generator input is increased 16x. These two
parameters control the pulse gain factor X (see table
below). Allowed values are 1 or 0. Default is 01 (X = 6/64).
1.5 * 2
1.5 * 2
1.5 * 2
-4
1.5
= 0.09375
X
6
2
= 96
= 6
Description
PULSE_FAST
0
0
1
1
78M6612 Data Sheet
PULSE_SLOW
0
1
0
1
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