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71M6534 Datasheet(PDF) 87 Page - Maxim Integrated Products

Part No. 71M6534
Description  Exceeds IEC 62053/ANSI C12.20 Standards
Download  132 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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71M6534 Datasheet(HTML) 87 Page - Maxim Integrated Products

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FDS_6533_6534_004
71M6533/G/H and 71M6534/H Data Sheet
Rev 2
87
GP0
GP7
20C0
20C7
0
0
NV
NV
R/W
Non-volatile general-purpose registers powered by the RTC supply. These registers
maintain their value in all power modes, but will be cleared on reset. The values of
GP0…GP7 will be undefined if VBAT drops below the minimum value.
IE_FWCOL0
IE_FWCOL1
SFR E8[2]
SFR E8[3]
0
0
0
0
R/W
R/W
Interrupt flags for the Firmware Collision Interrupt. See the Flash Memory section for
details.
IE_PB
SFR E8[4]
0
R/W
PB flag. Indicates that a rising edge occurred on PB. Firmware must write a zero to
this bit to clear it. The bit is also cleared when the MPU requests SLEEP or LCD
mode. On bootup, the MPU can read this bit to determine if the part was woken with
the PB DIO0[0].
IE_PLLRISE
SFR E8[6]
0
0
R/W
Indicates that the MPU was woken or interrupted (INT4) by system power becoming
available, or more precisely, by PLL_OK rising. The firmware must write a zero to this
bit to clear it.
IE_PLLFALL
SFR E8[7]
0
0
R/W
Indicates that the MPU has entered BROWNOUT mode because system power has
become unavailable (INT4), or more precisely, because PLL_OK fell. This bit will not
be set if the part wakes into BROWNOUT mode because of PB or the WAKE timer.
The firmware must write a zero to this bit to clear it.
IEN_SPI
20B0[4]
R/W SPI interrupt enable.
IEN_WD_NROVF 20B0[0]
0
0
R/W Active high watchdog near overflow interrupt enable.
IE_XFER
IE_RTC
SFR E8[0]
SFR E8[1]
0
0
0
0
R/W Interrupt flags. These flags monitor the XFER_BUSY interrupt and the RTC_1SEC
interrupt. The flags are set by hardware.
IE_WAKE
SFR E8[5]
0
R/W Indicates that the MPU was awakened by the autowake timer. This bit is typically read
by the MPU on bootup. The firmware must write a zero to this bit to clear it.
INTBITS
SFR F8[6:0]
R/W
Interrupt inputs. The MPU may read these bits to see the status of external interrupts
INT0, INT1 up to INT6. These bits do not have any memory and are primarily intended
for debug use.
LCD_BITMAP
[31:24]
2023[7:0]
0
L
R/W Configuration for DIO11/SEG31 through DIO4/SEG24. Unused bits should be set to zero.
1 = LCD pin, 0 = DIO pin.
LCD_BITMAP
[39:32]
2024[7:0]
0
L
R/W
Configuration for DIO19/SEG39 through DIO12/SEG32. LCD_BITMAP[32] ,
corresponding to DIO12/SEG32, is only applicable to the 71M6534. Unused bits
should be set to zero.
1 = LCD pin, 0 = DIO pin.
LCD_BITMAP
[47:40]
2025[7:0]
0
L
R/W
Configuration for DIO27/SEG47 through DIO20/SEG40. LCD_BITMAP[42],
corresponding to DIO22/SEG42, is only applicable to the 71M6534. Unused bits should
be set to zero.
1 = LCD pin, 0 = DIO pin.
LCD_BITMAP
[50:48]
2026[2:0]
0
L
R/W
Configuration for DIO30/SEG50 through DIO28/SEG48. LCD_BITMAP[48],
corresponding to DIO28/SEG48, is only applicable to the 71M6534. Unused bits should
be set to zero.
1 = LCD pin, 0 = DIO pin.


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