参数资料
型号: 71M6531F-IMR/F
厂商: Maxim Integrated
文件页数: 62/121页
文件大小: 0K
描述: IC ENERGY METER 256KB 68-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: *
Data Sheet 71M6531D/F-71M6532D/F
Figure 26 illustrates the CE/MPU data flow.
Pulses
IRQ
FDS 6531/6532 005
Samples
CE
Pre -
Processor
Data
MPU
Post -
Processor
Processed
Metering
Data
I/O RAM (Configuration RAM)
Figure 26: MPU/CE Data Flow
2.7
CE/MPU Communication
Figure 27 shows the functional relationships between the CE and the MPU. The CE is controlled by the
MPU via shared registers in the I/O RAM and in RAM.
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 pro-
cessing data. This signal will occur once every multiplexer cycle. XFER_BUSY indicates that the CE is
updating data to the output region of the RAM. This will occur whenever the CE has finished generating a
sum by completing an accumulation interval determined by SUM_CYCLES[5:0] * PRE_SAMPS[1:0] samples.
Interrupts to the MPU occur on the falling edges of the XFER_BUSY and CE_BUSY signals.
Refer to Section 4.3 CE Interface Description for additional information on setting up the device using the
MPU firmware.
VAR
(DIO7)
PULSES
W (DIO6)
APULSEW
APULSER
EXT PULSE
SAG CONTROL
MPU
DISPLAY (Memory
mapped LCD
segments)
SERIAL
(UART0/1)
ADC
Mux Control
SAMPLES
CE
DATA
CE BUSY
XFER BUSY
INTERRUPTS
EEPROM
(I 2 C)
DIO
I/O RAM (Configuration RAM)
Figure 27: MPU/CE Communication
62
Rev 2
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