71M6541F Maxim, 71M6541F Datasheet - Page 69
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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LCD Drivers (71M6541D/F/G)
With a maximum of 35 LCD driver pins available, the 71M6541D/F/G is capable of driving up to 6 x 35 =
210 pixels of an LCD display when using the 6 x multiplex mode. At eight pixels per digit, this
corresponds to 26 digits.
LCD segment data is written to the LCD_SEGn[5:0] I/O RAM registers as described in
SEG46 through SEG50 cannot be configured as DIO pins. Display data for these pins are written to I/O
RAM registers LCD_SEG46[5:0] through LCD_SEG50[5:0] (see
high, it overrides the SEG functionality, and pins E_RXTX/SEG48, E_TCLK/SEG49 and E_RST/SEG50
function as ICE interface pins.
LCD_MAP[46] and LCD_MAP[47] (I/O RAM 0x2406[6] and 0x2407[7]) must be set to 1 in order to permit
TMUX2OUT/SEG46 and TMUXOUT/SEG47 to operate as SEG drivers, otherwise. If LCD_MAP[46] and
LCD_MAP[47] are 0, these pins operate as TMU2XOUT and TMUXOUT (see
(TMUXOUT and TMUX2OUT Pins)
Rev 2
Table 58: 71M6541D/F/G LCD Data Registers for SEG46 to SEG50
SEG
Pin #
Configuration
SEG Data Register
on page 78).
when used for ICE interface
46
61
or TMUXOUT/TMUX2OUT.
Always LCD pins, except
47
60
71M6541D/F/G and 71M6542F/G Data Sheet
Table
48
38
58). When the ICE_E pin is pulled
49
37
50
36
2.5.12 Test Ports
2.5.8.2
and
2.5.8.3.
69
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