71M6542F-IGT/F Maxim Integrated Products, 71M6542F-IGT/F Datasheet - Page 26

• Manufacturer Part Number: 71M6542F-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6542F-IGT/F

• Core: 8051
• Core Architecture: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 5 KB
• Device Million Instructions Per Second: 5 MIPS
• Interface Type: I2C, ICE, SPI, UART
• Maximum Clock Frequency: 5 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Programmable I/os: 51
• Number Of Timers: 2
• On-chip Adc: 22 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Package / Case: LQFP-100
• Processor Series: 8051
• Program Memory Size: 64 KB
• Program Memory Type: Flash
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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RTM DATA0 (32 bits)
RTM DATA1 (32 bits)
RTM DATA2 (32 bits)
RTM DATA3 (32 bits)
RTM TIMING
ADC TIMING
CE TIMING
ADC EXECUTION
CE_EXECUTION
MUX_STATE
MUX_SYNC
NOTES:
XFER_BUSY
MUX STATE
MUX_SYNC
CKTEST
CE_BUSY
CK32
RTM
CK32
Figure 11: Timing relationship between ADC MUX, CE, and RTM Serial Transfer
RTM
1. ALL DIMENSIONS ARE 5MHZ CK COUNTS.
2. THE PRECISE FREQUENCY OF CK IS 150*CRYSTAL FREQUENCY = 4.9152MHz.
3. XFER_BUSY OCCURS ONCE EVERY SUM_SAMPS CODE PASSES.
FLAG
S
0
0
1
150
30
0
© 2008–2011 Teridian Semiconductor Corporation
31
CK COUNT = CE_CYCLES + 1CK for each ADC transfer
ADC0
FLAG
450
INITIATED BY A CE OPCODE AT END OF SUM INTERVAL
Figure 10: RTM Timing
0
MUX_DIV
1
1
30
Conversions, MUX_DIV=4 is shown
31
ADC MUX Frame
ADC1
900
FLAG
S
2
0
1
30
ADC2
31
1350
FLAG
MAX CK COUNT
3
0
1
ADC3
30
1800
Settle
140
31
S
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