71M6541F Maxim, 71M6541F Datasheet - Page 105
71M6541F
Manufacturer Part Number
71M6541F
Description
The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are Teridian™ 4th-generation single-phase metering SoCs with a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and LCD driver
Manufacturer
Maxim
Datasheet
1.71M6541D.pdf
(166 pages)
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5
5.1
In
Unimplemented bits have no memory storage, writing them has no effect, and reading them always returns zero. Reserved bits are identified with
an ‘R’, and must always be written with a zero. Writing values other than zero to reserved bits may have undesirable side effects and must be
avoided. Non-volatile bits are shaded in dark gray. Non-volatile bits are backed-up during power failures if the system includes a battery connected
to the VBAT pin.
The I/O RAM locations listed in
I/O RAM locations are usually modified only at boot-up. The addresses shown in
from
Rev 2
LCD_MAP6
Table 74
Reserved
RTMUX
MUX5
MUX4
MUX3
MUX2
MUX1
MUX0
TEMP
Name
RCE0
LCD0
LCD1
LCD2
Table 75
CE6
CE5
CE4
CE3
CE2
CE1
CE0
Firmware Interface
I/O RAM Map –Functional Order
and
which are used throughout document. For instance, EQU[2:0] can be accessed at I/O RAM 0x2000[7:5] or at I/O RAM 0x2106[7:5].
200C
200D
Table
Addr
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
200A
200B
200E
200F
2010
2011
2012
2013
2014
75, unimplemented (U) and reserved (R) bits are shaded in light gray. Unimplemented bits are identified with a ‘U’.
TEMP_BSEL
LCD_BAT
LCD_E
Bit 7
LCD_VMODE[1:0]
U
R
U
U
Table 74
CHOPR[1:0]
Table 74: I/O RAM Map – Functional Order, Basic Configuration
EQU[2:0]
TEMP_PWR
have sequential addresses to facilitate reading by the MPU (e.g., in order to verify their contents). These
Bit 6
U
U
U
R
R
MUX_DIV[3:0]
MUX9_SEL
MUX7_SEL
MUX5_SEL
MUX3_SEL
MUX1_SEL
LCD_MODE[2:0]
TMUXRB[2:0]
OSC_COMP
DIFFB_E
Bit 5
R
R
TEMP_BAT
DIFFA_E
Bit 4
PLS_MAXWIDTH[7:0]
PLS_INTERVAL[7:0]
U
SUM_SAMPS[7:0]
LCD_MAP[55:48]
U
R
Table 74
LCD_ALLCOM
TBYTE_BUSY
RFLY_DIS
LCD_BLNKMAP23[5:0]
LCD_BLNKMAP22[5:0]
Bit 3
RMT_E
are an alternative sequential address to the addresses
U
U
CHOP_E[1:0]
CE_LCTN[5:0]
SUM_SAMPS[12:8]
71M6541D/F/G and 71M6542F/G Data Sheet
LCD_Y
Bit 2
R
U
FIR_LEN[1:0]
MUX10_SEL
MUX8_SEL
MUX6_SEL
MUX4_SEL
MUX2_SEL
MUX0_SEL
TEMP_PER[2:0]
TMUXRA[2:0]
RTM_E
Bit 1
R
U
LCD_CLK[1:0]
PLS_INV
CE_E
Bit 0
U
R
105
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