71M6521FE-IM/F Maxim Integrated Products, 71M6521FE-IM/F Datasheet - Page 80

• Manufacturer Part Number: 71M6521FE-IM/F
• Description: IC ENERGY METER 32K FLASH 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 71M6521FE-IM/F

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RTC_DEC_SEC
RTC_INC_SEC
RTM_E
RTM0[7:0]
RTM1[7:0]
RTM2[7:0]
RTM3[7:0]
SECURE
SLEEP
SUM_CYCLES[5:0]
TMUX[4:0]
TRIM[7:0]
TRIMSEL[3:0]
Page: 80 of 107
SFRB2[6]
20AA[4:0]
20FD[3:0]
2001[5:0]
201C[1]
201C[0]
20A9[6]
2002[3]
20FF
2060
2061
2062
2063
0
0
0
0
0
0
0
0
0
0
2
0
0
--
--
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
RTC time correction bits. Only one bit may be pulsed at a time.
When pulsed, causes the RTC time value to be incremented (or
decremented) by an additional second the next time the RTC_SEC
register is clocked. The pulse width may be any value. If an
additional correction is desired, the MPU must wait 2 seconds
before pulsing one of the bits again. Each write to one of these bits
must be preceded by a write to 201F (WE).
Real Time Monitor enable. When ‘0’, the RTM output is low. This
bit enables the two wire version of RTM
Four RTM probes. Before each CE code pass, the values of these
registers are serially output on the RTM pin. The RTM registers are
ignored when RTM_E=0.
Enables security provisions that prevent external reading of flash
memory and CE program RAM. This bit is reset on chip reset and
may only be set. Attempts to write zero are ignored.
Takes the 6521DE/DH/FE to sleep mode. Ignored if system power
is present. The part will wake when the autowake timer times out,
when push button is pushed, or when system power returns.
The number of pre-summer outputs summed in the final summer.
Selects one of 32 signals for TMUXOUT.
Contains TRIMT[7:0], TRIMBGA,TRIMBGB or TRIMM[2:0] depending
on the value written to TRIMSEL[3:0]. If TRIMBGB = 0, the device is
a 71M6521DE/FE, else it is a 71M6521DH.
Selects the temperature trim fuse to be read with the TRIM register:
[4:0]
0x00
0x02
0x04
0x06
0x08
0x0A
0x14
0x16 –
0x17
0x19
0x1B
0x1D
0x1F
TRIMSEL[3:0]
1
4
5
6
Selected Signal
DGND (analog)
Reserved
Reserved
VBIAS (analog)
Reserved
Reserved
RTM (Real time
output from CE)
Not used
MUX_SYNC
CK_MPU
RTCLK_2P5
XFER_BUSY
TRIMT[7:0]
TRIMM[2:0]
TRIMBGA
TRIMBGB
Trim Fuse
71M6521DE/DH/FE Data Sheet
[4:0]
0x01
0x03
0x05
0x07
0x09
0x0B
-0x13
0x15
0x18
0x1A
0x1C
0x1E
Purpose
Trim for the magnitude of
VREF
Trim values related to
temperature compensation
Selected Signal
Reserved
Reserved
Reserved
Not used
Reserved
Reserved
WDTR_E, comparator 1
Output AND V1LT3)
RXD, from optical in-
terface, after optional
inversion
CK_10M
Reserved
CE_BUSY
Rev 2