71m6543h-igtr/f Maxim Integrated Products, Inc., 71m6543h-igtr/f Datasheet - Page 111

• Manufacturer Part Number: 71m6543h-igtr/f
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

v1.0
Name
OPT_BB
OPT_FDC[1:0]
OPT_RXDIS
OPT_RXINV
OPT_TXE [1,0]
OPT_TXINV
OPT_TXMOD
OSC_COMP
PB_STATE
PERR_RD
PERR_WR
PLL_OK
PLL_FAST
SFR FC[6]
SFR FC[5]
SFR F8[0]
SFR F9[4]
Location Rst Wk Dir
2457[5:4]
2456[3:2] 00 –
28A0[5]
2457[0]
2457[2]
2457[1]
2456[0]
2456[1]
2200[4]
0
0
0
0
0
0
0
0
0
0
0
–
–
–
–
–
–
–
0
0
0
0
© 2008–2011 Teridian Semiconductor Corporation
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
Description
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
and Optical Interface
heading on page 57.
Selects OPT_TX modulation duty cycle
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 = 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.
Configures the OPT_TX output pin.
If LCD_MAP[51] = 0:
If LCD_MAP[51] = 1:
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.
Enables the automatic update of RTC_P[16:0] and RTC_Q [1:0]every time the temperature
is measured.
The de-bounced state of the PB pin.
The 71M6543F/H 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.
Indicates that the clock generation PLL is settled.
Controls the speed of the PLL and MCK.
1 = 19.66 MHz (XTAL * 600)
0 = 6.29 MHz (XTAL * 192)
OPT_FDC
00
01
10
11
00 = DIO51, 01 = OPT_TX, 10 = WPULSE, 11 = VPULSE
xx = SEG51
Function
50% Low
25% Low
12.5% Low
6.25% Low
=under the “Bit Banged Optical UART (Third UART)” sub-
71M6543F/H Data Sheet
2.5.9 UART
111