71M6543F/H and 71M6543G/GH Data Sheet
Name
Location Rst Wk Dir Description
MUX8_SEL[3:0]
MUX9_SEL[3:0]
MUX10_SEL[3:0]
2101[3:0]
2101[7:4]
2100[3:0]
0
0
0
0
0
0
R/W Selects which ADC input is to be converted during time slot 8.
R/W Selects which ADC input is to be converted during time slot 9.
R/W Selects which ADC input is to be converted during time slot 10.
MUX_DIV[3:0] is the number of ADC time slots in each MUX frame. The maximum
number of time slots is 11.
MUX_DIV[3:0]
2100[7:4]
0
0
R/W
Configures the input of the optical port to be a DIO pin to allow it to be
bit-banged. In this case, DIO5 becomes a third high speed UART. Refer to 2.5.9 UART
and Optical Interface =under the “Bit Banged Optical UART (Third UART)” sub-
OPT_BB
2457[0]
0
–
R/W
heading on page 57.
Selects OPT_TX modulation duty cycle
Function
50% Low
25% Low
12.5% Low
6.25% Low
OPT_FDC
00
01
10
11
OPT_FDC[1:0]
2457[5:4]
0
–
R/W
OPT_RX can be configured as an input to the optical UART or as SEGDIO55.
OPT_RXDIS = 0 and LCD_MAP[55] = 0: OPT_RX
OPT_RXDIS
OPT_RXINV
OPT_TXE [1,0]
2457[2]
2457[1]
0
0
–
–
R/W OPT_RXDIS = 1 and LCD_MAP[55] = 0: DIO55
OPT_RXDIS = 0 and LCD_MAP[55] = 1: SEG55
OPT_RXDIS = 1 and LCD_MAP[55] = 1: SEG55
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.
R/W
Configures the OPT_TX output pin.
If LCD_MAP[51] = 0:
00 = DIO51, 01 = OPT_TX, 10 = WPULSE, 11 = VPULSE
If LCD_MAP[51] = 1:
xx = SEG51
2456[3:2] 00 – R/W
OPT_TXINV
2456[0]
2456[1]
0
0
–
–
R/W Invert OPT_TX when 1. This inversion occurs before modulation.
Enables modulation of OPT_TX. When OPT_TXMOD is set, OPT_TX is modulated
R/W when it would otherwise have been zero. The modulation is applied after any inversion
caused by OPT_TXINV.
OPT_TXMOD
Enables the automatic update of RTC_P[16:0] and RTC_Q [1:0]every time the temperature
is measured.
OSC_COMP
PB_STATE
28A0[5]
0
0
0
–
0
0
R/W
SFR F8[0]
R
The de-bounced state of the PB pin.
PERR_RD
PERR_WR
SFR FC[6]
SFR FC[5]
The 71M6543 sets these bits to indicate that a parity error on the remote sensor has
been detected. Once set, the bits are remembered until they are cleared by the MPU.
R/W
112
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