78M6612-IGTR/F Maxim Integrated Products, 78M6612-IGTR/F Datasheet - Page 62
78M6612-IGTR/F
Manufacturer Part Number
78M6612-IGTR/F
Description
IC POWER MEASUREMENT AC 64-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.78M6612-IMF.pdf
(111 pages)
Specifications of 78M6612-IGTR/F
Mounting Style
SMD/SMT
Package / Case
LQFP-64
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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78M6612 Data Sheet
2.7 CE/MPU Communication
Figure 26
shared registers in the I/O RAM and by registers in the CE DRAM. The CE outputs two interrupt signals
to the MPU: CE_BUSY and XFER_BUSY, which are connected to the MPU interrupt service inputs as
external interrupts. CE_BUSY indicates that the CE is actively processing data. This signal will occur
once every multiplexer cycle. XFER_BUSY indicates that the CE is updating data to the output region of
the CE DRAM. This will occur whenever the CE has finished generating a sum by completing an
accumulation interval determined by SUM_CYCLES * PRE_SAMPS samples. Interrupts to the MPU occur
on the falling edges of the XFER_BUSY and CE_BUSY signals.
62
shows the functional relationship between CE and MPU. The CE is controlled by the MPU via
Mux Ctrl.
ADC
I/O RAM (CONFIGURATION RAM)
VAR (DIO7)
SAMPLES
Figure 26: MPU/CE Communication
CE
PULSES
W (DIO6)
INTERRUPTS
SAG CONTROL
XFER_BUSY
EXT_PULSE
APULSEW
APULSER
CE_BUSY
DATA
MPU
LCD segments)
DISPLAY (me-
mory-mapped
(UART0/1)
EEPROM
DIO
SERIAL
(I2C)
DS_6612_001
Rev. 1.2
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