71m6534h-igt Maxim Integrated Products, Inc., 71m6534h-igt Datasheet - Page 89

• Manufacturer Part Number: 71m6534h-igt
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

FDS_6533_6534_004
v1.1
TRIMSEL[3:0]
TRIM[7:0]
UMUX_E*
UMUX_SEL*
VB_REF
VDDREGZ
VERSION[7:0]
VREF_CAL
VREF_DIS
WAKE_ARM
WAKE_PRD
WAKE_RES
WD_NROVF_
FLAG
WD_RST
20FD[3:0]
20FF
200F[7]
S00F[6]
2005[6]
2005[7]
2006
20C8
2004[7]
2004[3]
20A9[7]
20A9[2:0]
20A9[3]
20B1[0]
SFR F8[7]
001
0
0
0
0
0
0
–
–
0
0
0
0
–
0
0
0
0
0
0
0
–
–
0
0
–
–
–
0
0
© 2007-2009 TERIDIAN Semiconductor Corporation
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
R
R
Selects the temperature trim fuse to be read with the TRIM register:
Contains TRIMBGA,TRIMBGB or TRIMM[2:0] depending on the value written to
TRIMSEL[3:0]. If TRIMBGB = 0, the device is a 71M6533/71M6534, else it is a
71M6533H/71M6534H.
Enables the optical UART multiplexer, selects the alternate function (MTX, MRX) for
DIO8, DIO9.
When UMUX_E = 1, selects between OPT_TX, OPT_RX and MTX, MRX as the optical
UART I/O pins. 0 = OPT_TX, OPT_RX, 1 = MTX, MRX
Configures the ADC so that VB is the zero reference.
When zero, changes the input reference of the ADC to V3P3A for the IA, IB, VA and
VB inputs. Otherwise, the reference is VBIAS.
The device version index. This word may be read by the firmware to determine the
silicon version.
Brings VREF to the VREF pad. This feature is disabled when VREF_DIS =1.
Disables the internal voltage reference.
Writing a 1 to this bit arms the autowake timer and presets it with the values presently
in WAKE_PRD and WAKE_RES. The autowake timer is reset and disarmed whenever
the processor is in MISSION mode or BROWNOUT mode. The timer must be armed
at least three RTC cycles before the SLEEP or LCD-ONLY mode is commanded.
Sleep time. Time = WAKE_PRD[2:0]*WAKE_RES. The default = 001. The maximum
value is 7.
Resolution of WAKE timer: 1 = 1 minute, 0 = 2.5 seconds.
This flag is set approximately 1 ms before the watchdog timer overflows. It is cleared
by writing a 0 or on the falling edge of WAKE.
WD timer bit. This bit must be accessed with byte operations. Operations possible for
this bit are:
TRIMSEL[3:0]
VERSION[7:0]
Write 0: Clears the flag.
Write 1: Resets the WDT.
0000 0101
1
4
5
6
TRIMT[7:0]
TRIMM[2:0]
TRIMBGA
TRIMBGB
Silicon Version
A05
Trim Fuse
Purpose
Trim for the magnitude of VREF
Trim values related to temperature com-
pensation
71M6533/71M6534 Data Sheet
89