71M6543F-DB-CT Maxim Integrated Products, 71M6543F-DB-CT Datasheet - Page 53
71M6543F-DB-CT
Manufacturer Part Number
71M6543F-DB-CT
Description
Power Management Modules & Development Tools 71M6543 Eval Kit
Manufacturer
Maxim Integrated Products
Datasheet
1.71M6543F-DB.pdf
(157 pages)
Specifications of 71M6543F-DB-CT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 53 of 157
- Download datasheet (3Mb)
right-shifted by two bits to obtain an 8-bit plus sign value (i.e., NV RAM Address = STEMP[10:0]/4). A
The default frequency is 32,768 RTCLK cycles per second. To shift the clock frequency by ∆ ppm,
RTC_P and RTC_Q are calculated using the following equation:
Conversely, the amount of ppm shift for a given value of 4RTC_P+RTC_Q is:
For example, for a shift of -988 ppm, 4 ⋅ RTC_P + RTC_Q = 262403 = 0x40103. RTC_P[16:0] = 0x10040,
(I/O RAM 0x289B[2:0], 0x289C, 0x289D[7:2]) and RTC_Q[1:0] = 0x03 (I/O RAM 0x289D[1:0]. The default
values of RTC_P[16:0] and RTC_Q[1:0], corresponding to zero adjustment, are 0x10000 and 0x0, respectively.
Two settings for the TMUX2OUT test pin, PULSE_1S and PULSE_4S, are available for measuring and
calibrating the RTC clock frequency. These are waveforms of approximately 25% duty cycle with 1s or 4s
period.
If the crystal temperature coefficient is known, the MPU can integrate temperature and correct the RTC
time as necessary. Alternatively, the characteristics can be loaded into an NV RAM and the OSC_COMP
(I/O RAM 0x28A0[5]) bit may be set. In this case, the oscillator is adjusted automatically, even in SLP
mode. See
2.5.4.4 RTC Temperature Compensation
The 71M6543 can be configured to regularly measure die temperature, including in SLP and LCD modes
and while the MPU is halted. If enabled by OSC_COMP, this temperature information is automatically
used to correct for the temperature variation of the crystal. A table lookup method is used.
Referring to
v1.2
Table 44
Name
OSC_COMP
STEMP[10:3]
STEMP[2:0]
LKPADDR[6:0]
LKPAUTOI
LKPDAT[7:0]
LKP_RD
LKP_WR
Default values for RTCA_ADJ[6:0], RTC_P[16:0] and RTC_Q[1:0] should be nominal values, at
the center of the adjustment range. Un-calibrated extreme values (zero, for example) can cause
incorrect operation.
shows I/O RAM registers involved in automatic RTC temperature compensation.
Figure 13
2.5.4.4 RTC Temperature Compensation
Table 44: I/O RAM Registers for RTC Temperature Compensation
Location
2881[7:0]
2882[7:5]
2887[6:0]
2888[7:0]
28A0[5]
2887[7]
2889[1]
2889[0]
the table lookup method uses the 10-bits plus sign-bit value in STEMP[10:0]
© 2008–2011 Teridian Semiconductor Corporation
4
Rst
⋅
0
–
0
0
0
0
0
RTC_P
∆
(
Wk
ppm
0
–
0
0
0
0
0
+
)
=
R/W
R/W
R/W
R/W
R/W
R/W
RTC_Q
Dir
R
4
⋅
RTC
32768
Description
Enables the automatic update of RTC_P[16:0] and
RTC_Q[1:0] every time the temperature is measured.
The result of the temperature measurement (10-bits
of magnitude data plus a sign bit).
The address for reading and writing the RTC lookup
RAM.
Auto-increment flag. When set, LKPADDR[6:0] auto
increments every time LKP_RD or LKP_WR is pulsed.
The incremented address can be read at
LKPADDR[6:0].
The data for reading and writing the RTC lookup
RAM.
Strobe bits for the RTC lookup RAM read and write.
When set, the LKPADDR[6:0] and LKPDAT registers
are used in a read or write operation. When a strobe is
set, it stays set until the operation completes, at which
time the strobe is cleared and LKPADDR[6:0] is
incremented if LKPAUTOI is set.
=
P
for details.
+
floor
⋅
RTC
8
71M6543F/H and 71M6543G/GH Data Sheet
Q
1
−
32768
+
1
⋅ ∆
⋅
10
10
6
⋅
8
−
6
+
0
5 .
53
Related parts for 71M6543F-DB-CT
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
PMIC Solutions Precision Energy Meter IC
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
PMIC Solutions Precision Energy Meter IC
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Power Management Modules & Development Tools 71M6543 Eval Kit
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products