78M6612-IM/F Maxim Integrated Products, 78M6612-IM/F Datasheet - Page 62

• 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

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