71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
FIRMWARE INTERFACE
I/O RAM MAP – In Numerical Order
‘Not Used’ bits are grayed out, contain no memory and are read by the MPU as zero. RESERVED bits may be in use and
should not be changed. This table lists only the SFR registers that are not generic 8051 SFR registers.
Name Addr
Configuration:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CE0
CE1
CE2
2000
2001
2002
EQU[2:0]
PRE_SAMPS[1:0]
MUX_DIV[1:0]
CE_E
Reserved
SUM_CYCLES[5:0]
RTM_E WD_OVF
Reserved
CHOP_E[1:0]
EX_RTC
EX_XFR
COMP0 2003 Not Used
PLL_OK
Not Used
Reserved Reserved COMP_STAT[0]
CONFIG0 2004 VREF_CAL PLS_INV
CONFIG1 2005 Reserved Reserved
VERSION 2006
CKOUT_E[1:0]
VREF_DIS
ADC_E
MPU_DIV[2:0]
FLSH66Z
ECK_DIS
FIR_LEN
MUX_ALT
Reserved
VERSION[7:0]
EX_PLL EX_FWCOL
20A8 Not Used Not Used Not Used
CONFIG2 2007
OPT_TXE[1:0]
Reserved
CE_LCTN[4:0]
WAKE_PRD[2:0]
TMUX[4:0]
OPT_FDC[1:0]
CE3
WAKE 20A9 WAKE_ARM
SLEEP
LCD_ONLY Not Used WAKE_RES
TMUX 20AA Not Used Not Used Not Used
Digital I/O:
OPT_TXMOD
DI_RPB[2:0]
DIO_R2[2:0]
DIO_R4[2:0]
DIO_R6[2:0]
DIO_R8[2:0]
DIO_R10[2:0]
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
2008
DIO_EEX[1:0]
OPT_RXDIS OPT_RXINV DIO_PW
DIO_PV
OPT_TXINV
2009 Not Used
200A Not Used
200B Not Used
200C Not Used
200D Not Used
200E Not Used
DIO_R1[2:0]
Reserved
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
DIO_R5[2:0]
DIO_R7[2:0]
DIO_R9[2:0]
DIO_R11[2:0]
Real Time Clock:
RTC0 2015 Not Used Not Used
RTC1 2016 Not Used Not Used
RTC_SEC[5:0]
RTC_MIN[5:0]
RTC_HR[4:0]
RTC_DAY[2:0]
RTC_DATE[2:0]
RTC_MO[3:0]
RTC_YR[7:0]
RTC2 2017 Not Used Not Used Not Used
RTC3 2018 Not Used Not Used Not Used
RTC4 2019 Not Used Not Used Not Used
RTC5 201A Not Used Not Used Not Used
RTC6 201B
Not Used
Not Used
Not Used
Not Used
Not Used
RTC_DEC_SEC RTC_INC_SEC
RTC7 201C Not Used Not Used Not Used
Not Used
WE
201F
Write enable for RTC
LCD Display Interface:
LCDX 2020 Not Used
LCDY 2021 Not Used
BME
LCD_Y
Reserved
LCD_E
LCD_NUM[4:0]
LCD_MODE[2:0]
LCD_CLK[1:0]
LCDZ 2022 Not Used Not Used
LCD0 2030
Not Used
Not Used
Not Used
Reserved
LCD_SEG0[3:0]
…
…
…
LCD19 2043
LCD24 2048
Not Used
Not Used
Not Used
LCD_SEG19[3:0]
LCD_SEG24[3:0]
…
…
…
LCD38 2056
LCD_BLNK 205A
Not Used
LCD_BLKMAP19[3:0]
LCD_SEG38[3:0]
LCD_BLKMAP18[3:0]
Page: 70 of 101
© 2005-2008 TERIDIAN Semiconductor Corporation
v1.0
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