71M6521DE-IMR/F Maxim Integrated Products, 71M6521DE-IMR/F Datasheet - Page 43
71M6521DE-IMR/F
Manufacturer Part Number
71M6521DE-IMR/F
Description
IC ENERGY METER 16K FLASH 68-QFN
Manufacturer
Maxim Integrated Products
Datasheet
1.71M6521DE-IMRF.pdf
(107 pages)
Specifications of 71M6521DE-IMR/F
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 43 of 107
- Download datasheet (3Mb)
Status
3-0
Bit
7
6
5
4
71M6521DE/DH/FE Data Sheet
EEPROM Interface
The 71M6521DE/DH/FE provides hardware support for either type of EEPROM interface, a two-pin interface and a
three-pin interface. The interfaces use the EECTRL and EEDATA registers for communication.
Two-Pin EEPROM Interface
The dedicated 2-pin serial interface communicates with external EEPROM devices. The interface is multiplexed onto
pins DIO4 (SCK) and DIO5 (SDA) controlled by the DIO_EEX bit I/O RAM (see I/O RAM Table). The MPU
communicates with the interface through two SFR registers: EEDATA and EECTRL. If the MPU wishes to write a byte
of data to EEPROM, it places the data in EEDATA and then writes the ‘Transmit’ command (CMD = 0011) to EECTRL.
This initiates the transmit operation. The transmit operation is finished when the BUSY bit falls. Interrupt INT5 is also
asserted when BUSY falls. The MPU can then check the RX_ACK bit to see if the EEPROM acknowledged the
transmission.
A byte is read by writing the ‘Receive’ command (CMD = 0001) to EECTRL and waiting for the BUSY bit to fall. Upon
completion, the received data is in EEDATA. The serial transmit and receive clock is 78kHz during each transmission,
and the clock is held in a high state until the next transmission. The bits in EECTRL are shown in Table 57.
The EEPROM interface can also be operated by controlling the DIO4 and DIO5 pins directly (“bit-banging”).
However, controlling DIO4 and DIO5 directly is discouraged, because it may tie up the MPU to the point
where it may become too busy to process interrupts.
Rev 2
CMD[3:0
RX_ACK
TX_ACK
ERROR
Name
BUSY
]
Read/
Write
W
R
R
R
R
Reset
State
0
0
1
1
0
see CMD
Negative
Negative
Positive,
Polarity
Positive
Positive
Table
Table 57: EECTRL Status Bits
Description
1 when an illegal command is received.
1 when serial data bus is busy.
0 indicates that the EEPROM sent an ACK bit.
0 indicates when an ACK bit has been sent to the EEPROM
Others
CMD
0000
0001
0011
0101
0110
1001
Operation
No-op. Applying the no-op command will stop the I
(SCK, DIO4). Failure to issue the no-op command will keep
the SCK signal toggling.
Receive a byte from EEPROM and send ACK.
Transmit a byte to EEPROM.
Issue a ‘STOP’ sequence.
Receive the last byte from EEPROM, do not send ACK.
Issue a ‘START’ sequence.
No Operation, set the ERROR bit.
Page: 43 of 107
2
C clock
Related parts for 71M6521DE-IMR/F
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC ENERGY METER 16K FLASH 68-QFN
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
IC ENERGY METER 16K FLASH 64LQFP
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
IC ENERGY METER 16K FLASH 64LQFP
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Power Management Modules & Development Tools 71M6521DE DEMO BOARD M6521DE DEMO BOARD
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products