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71M6545/71M6545H Data Sheet
5.2
I/O RAM Map – Alphabetical Order
Table 61 lists I/O RAM bits and registers in alphabetical order.
Bits with a write direction (W in column Dir) are written by the MPU into configuration RAM. Typically, they are initially stored in flash memory and
copied to the configuration RAM by the MPU. Some of the more frequently programmed bits are mapped to the MPU SFR memory space. The
remaining bits are mapped to the address space 0x2XXX. Bits with R (read) direction can be read by the MPU. Columns labeled Rst and Wk
describe the bit values upon reset and wake, respectively. No entry in one of these columns means the bit is either read-only or is powered by the
NV supply and is not initialized. Write-only bits return zero when they are read.
Locations that are shaded in grey are non-volatile (i.e., battery-backed).
Table 61: I/O RAM Map – Alphabetical Order
Name
Location
Rst Wk Dir
Description
ADC_E
ADC_DIV
2704[4]
2200[5]
0
0
0
0
R/W
R/W
Enables ADC and VREF. When disabled, reduces bias current.
ADC_DIV controls the rate of the ADC and FIR clocks.
The ADC_DIV setting determines whether MCK is divided by 4 or 8:
0 = MCK/4
1 = MCK/8
The resulting ADC and FIR clock is as shown below.
PLL_FAST = 0 PLL_FAST = 1
MCK
ADC_DIV = 0
ADC_DIV = 1
6.291456 MHz
1.572864 MHz
0.786432 MHz
19.660800 MHz
4.9152 MHz
2.4576 MHz
BCURR
BSENSE[7:0]
CE_E
2704[3]
2885[7:0]
2106[0]
0
–
0
0
–
0
R/W
R
R/W
Connects a 100 μA load to the battery (VBAT_RTC pin).
The result of the VBAT_RTC pin measurement. See 2.5.7 71M6545/H Battery Monitor
on page 55 .
CE enable.
CE_LCTN[5:0]
2109[5:0]
31 31 R/W
CE program location. The starting address for the CE program is 1024* CE_LCTN .
except at the mux sync edge at the end of an accumulation interval.
CHIP_ID[15:8]
CHIP_ID[7:0]
CHOP_E[1:0]
2300[7:0]
2301[7:0]
2106[3:2]
0
0
0
0
0
0
R
R
R/W
These bytes contain the chip identification.
Chop enable for the reference bandgap circuit. The value of CHOP changes on the
rising edge of the internal MUXSYNC signal according to the value in CHOP_E[1:0] :
00 = toggle 1 01 = positive 10 = reversed 11 = toggle
1
88
v2
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