78M6612 Data Sheet
DS_6612_001
Name
Location
Rst Wk
Dir
Description
MUX_DIV[1:0]
2002[7:6]
0
0
R/W The number of states in the input multiplexer.
00 – Illegal
01 – 4 states 10 – 3 states 11 – 2 states
OPT_FDC[1:0]
2007[1:0]
0
0
R/W Selects TX1 modulation duty cycle.
OPT_FDC
Function
00
01
10
11
50% Low
25% Low
12.5% Low
6.25% Low
RX1DIS
2008[5]
0
0
R/W RX1 can be configured as an analog input to the UART1
comparator or as a digital input/output, DIO1.
0—RX1, 1—DIO1.
RX1INV
2008[4]
0
0
R/W Inverts result from RX1 comparator when 1. Affects only
the UART1 input. Has no effect when RX1 is used as a
DIO input.
TX1E[1,0]
2007[7,6]
00
00
R/W Configures the TX1 output pin.
00—TX1, 01—DIO2, 10—WPULSE, 11—VARPULSE
TX1INV
2008[0]
2008[1]
0
0
0
0
R/W Invert TX1 when 1. This inversion occurs before
modulation.
TX1MOD
R/W Enables modulation of TX1. When TX1MOD is set, TX1 is
modulated when it would otherwise have been zero. The
modulation is applied after any inversion caused by
TX1INV.
PLL_OK
2003[6]
0
0
R
Indicates that system power is present and the clock
generation PLL is settled.
PLS_MAXWIDTH
[7:0]
2080[7:0]
FF
FF
R/W Determines the maximum width of the pulse (low going
pulse).
Maximum pulse width is (2*PLS_MAXWIDTH + 1)*TI.
Where TI is PLS_INTERVAL. If PLS_INTERVAL=0, TI is
the sample time (397µs). If 255, disable MAXWIDTH.
PLS_INTERVAL
[7:0]
2081[7:0]
2004[6]
0
0
0
0
R/W If the FIFO is used, PLS_INTERVAL must be set to 81. If
PLS_INTERVAL = 0, the FIFO is not used and pulses are
output as soon as the CE issues them.
PLS_INV
R/W Inverts the polarity of WPULSE and VARPULSE.
Normally, these pulses are active low. When inverted,
they become active high.
PREBOOT
SFRB2[7]
2001[7:6]
–
0
–
0
R
Indicates that preboot sequence is active.
The duration of the pre-summer, in samples.
00-42, 01-50, 10-84, 11-100.
PRE_SAMPS[1:0]
R/W
RTC_SEC[5:0]
RTC_MIN[5:0]
RTC_HR[4:0]
RTC_DAY[2:0]
RTC_DATE[4:0]
RTC_MO[3:0]
RTC_YR[7:0]
2015
2016
2017
2018
2019
201A
201B
–
–
–
–
–
–
–
–
–
–
–
–
–
–
R/W The RTC interface. These are the ‘year’, ‘month’, ‘day’,
R/W ‘hour’, ‘minute’ and ‘second’ parameters of the RTC. The
R/W RTC is set by writing to these registers. Year 00 and all
R/W others divisible by 4 are defined as leap years.
R/W
R/W
R/W
SEC 00 to 59
MIN 00 to 59
HR
00 to 23 (00=Midnight)
DAY 01 to 07 (01=Sunday)
DATE 01 to 31
MO 01 to 12
YR
00 to 99
Each write to one of these registers must be preceded by
a write to 201F (WE).
80
Rev. 1.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
