71M6521FE-IGT/F Maxim Integrated Products, 71M6521FE-IGT/F Datasheet - Page 79

• Manufacturer Part Number: 71M6521FE-IGT/F
• Description: IC ENERGY METER 32K FLASH 64LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 71M6521FE-IGT/F

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

71M6521DE/DH/FE Data Sheet
MUX_DIV[1:0]
OPT_FDC[1:0]
OPT_RXDIS
OPT_RXINV
OPT_TXE[1,0]
OPT_TXINV
OPT_TXMOD
PLL_OK
PLS_MAXWIDTH
[7:0]
PLS_INTERVAL
[7:0]
PLS_INV
PREBOOT
PRE_SAMPS[1:0]
RTC_SEC[5:0]
RTC_MIN[5:0]
RTC_HR[4:0]
RTC_DAY[2:0]
RTC_DATE[4:0]
RTC_MO[3:0]
RTC_YR[7:0]
Rev 2
2002[7:6]
SFRB2[7]
2007[1:0]
2007[7,6]
2080[7:0]
2081[7:0]
2001[7:6]
2008[5]
2008[4]
2008[0]
2008[1]
2003[6]
2004[6]
201A
201B
2015
2016
2017
2018
2019
FF
00
--
--
--
--
--
--
--
--
0
0
0
0
0
0
0
0
0
0
00
FF
--
--
--
--
--
--
--
--
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
The number of states in the input multiplexer.
Selects OPT_TX modulation duty cycle
OPT_RX can be configured as an analog input to the optical UART
comparator or as a digital input/output, DIO1.
0—OPT_RX, 1—DIO1.
Inverts result from OPT_RX comparator when 1. Affects only the
UART input. Has no effect when OPT_RX is used as a DIO input.
Configures the OPT_TX output pin.
00—OPT_TX, 01—DIO2, 10—WPULSE, 11—VARPULSE
Invert OPT_TX when 1. This inversion occurs before modulation.
Enables modulation of OPT_TX. When OPT_TXMOD is set,
OPT_TX is modulated when it would otherwise have been zero.
The modulation is applied after any inversion caused by
OPT_TXINV.
Indicates that system power is present and the clock generation PLL
is settled.
Determines the maximum width of the pulse (low going pulse).
Maximum pulse width is (2*PLS_MAXWIDTH + 1)*T
PLS_INTERVAL. If PLS_INTERVAL=0, T
(397µs). If 255, disable MAXWIDTH.
If the FIFO is used, PLS_INTERVAL must be set to 81. If
PLS_INTERVAL = 0, the FIFO is not used and pulses are output as
soon as the CE issues them.
Inverts the polarity of WPULSE and VARPULSE. Normally, these
pulses are active low. When inverted, they become active high.
Indicates that preboot sequence is active.
The duration of the pre-summer, in samples.
The RTC interface. These are the ‘year’, ‘month’, ‘day’, ‘hour’,
‘minute’ and ‘second’ parameters of the RTC. The RTC is set by
writing to these registers. Year 00 and all others divisible by 4 are
defined as leap years.
Each write to one of these registers must be preceded by a write to
201F (WE).
OPT_FDC
00- illegal
01- 4 states
00
01
10
11
SEC 00 to 59
MIN
HR
DAY 01 to 07 (01=Sunday)
DATE 01 to 31
MO
YR
00-42, 01-50, 10-84, 11-100.
00 to 59
00 to 23 (00=Midnight)
01 to 12
00 to 99
Function
50% Low
25% Low
12.5% Low
6.25% Low
10-3 states
11-2 states
I
is the sample time
I
. Where T
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I
is