71M6521DE Datasheet, PDF (77/101 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
RTM0[7:0]
RTM1[7:0]
RTM2[7:0]
RTM3[7:0]
2060
2061
2062
2063
0 0 R/W Four RTM probes. Before each CE code pass, the values of these
00
registers are serially output on the RTM pin. The RTM registers are
00
ignored when RTM_E=0.
00
SECURE
SFRB2[6] 0 -- R/W Enables security provisions that prevent external reading of flash
memory and CE program RAM. This bit is reset on chip reset and
may only be set. Attempts to write zero are ignored.
SLEEP
20A9[6]
0 0 W Takes the 6521DE/FE to sleep mode. Ignored if system power is
present. The part will wake when the autowake timer times out,
when push button is pushed, or when system power returns.
SUM_CYCLES[5:0] 2001[5:0] 0 0 R/W The number of pre-summer outputs summed in the final summer.
TMUX[4:0]
20AA[4:0] 2 -- R/W Selects one of 32 signals for TMUXOUT.
[4:0] Selected Signal
[4:0] Selected Signal
0x00 DGND (analog)
0x01 Reserved
0x02 Reserved
0x03 Reserved
0x04 Reserved
0x05 Reserved
0x06 VBIAS (analog)
0x07 Not used
0x08 Reserved
0x09 Reserved
0x0A Reserved
0x0B Reserved
-0x13
0x14
RTM (Real time
output from CE)
0x15 WDTR_E, comparator 1
Output AND V1LT3)
0x16 – Not used
0x17
0x18
RXD, from optical in-
terface, after optional
inversion
0x19 MUX_SYNC
0x1A CK_10M
0x1B CK_MPU
0x1C Reserved
0x1D RTCLK_2P5
0x1E CE_BUSY
0x1F XFER_BUSY
VERSION[7:0]
2006
-- --
R The version index. This word may be read by firmware to determine
the silicon version.
VERSION[7:0] Silicon Version
0000 0110
A06
VREF_CAL
VREF_DIS
2004[7]
2004[3]
0 0 R/W Brings VREF to VREF pad. This feature is disabled when
VREF_DIS=1.
0 1 R/W Disables the internal voltage reference.
WAKE_ARM
WAKE_PRD
20A9[7]
0 -- W Arm the autowake timer. 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 MPU 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.
20A9[2:0] 001 -- R/W Sleep time. Time=WAKE_PRD[2:0]*WAKE_RES. Default=001.
Maximum value is 7.
WAKE_RES
20A9[3]
0 -- R/W Resolution of WAKE timer: 1 – 1 minute, 0 – 2.5 seconds.
v1.0
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