Datasheet
Table Of Contents
- 1 Hardware Description
- 1.1 Hardware Overview
- 1.2 Analog Front End (AFE)
- 1.3 Digital Computation Engine (CE)
- 1.4 80515 MPU Core
- 1.4.1 Memory Organization and Addressing
- 1.4.2 Special Function Registers (SFRs)
- 1.4.3 Generic 80515 Special Function Registers
- 1.4.4 Special Function Registers (SFRs) Specific to the 71M6531D/F and 71M6532D/F
- 1.4.5 Instruction Set
- 1.4.6 UARTs
- 1.4.7 Timers and Counters
- 1.4.8 WD Timer (Software Watchdog Timer)
- 1.4.9 Interrupts
- 1.5 On-Chip Resources
- 1.5.1 Oscillator
- 1.5.2 Internal Clocks
- 1.5.3 Real-Time Clock (RTC)
- 1.5.4 Temperature Sensor
- 1.5.5 Physical Memory
- 1.5.6 Optical Interface
- 1.5.7 Digital I/O – 71M6531D/F
- 1.5.8 Digital I/O – 71M6532D/F
- 1.5.9 Digital IO – Common Characteristics for 71M6531D/F and 71M6532D/F
- 1.5.10 LCD Drivers – 71M6531D/F
- 1.5.11 LCD Drivers – 71M6532D/F
- 1.5.12 LCD Drivers – Common Characteristics for 71M6531D/F and 71M6532D/F
- 1.5.13 Battery Monitor
- 1.5.14 EEPROM Interface
- 1.5.15 SPI Slave Port
- 1.5.16 Hardware Watchdog Timer
- 1.5.17 Test Ports (TMUXOUT pin)
- 2 Functional Description
- 3 Application Information
- 3.1 Connection of Sensors
- 3.2 Connecting 5-V Devices
- 3.3 Temperature Measurement
- 3.4 Temperature Compensation
- 3.5 Connecting LCDs
- 3.6 Connecting I2C EEPROMs
- 3.7 Connecting Three-Wire EEPROMs
- 3.8 UART0 (TX/RX)
- 3.9 Optical Interface (UART1)
- 3.10 Connecting the V1 Pin
- 3.11 Connecting the Reset Pin
- 3.12 Connecting the Emulator Port Pins
- 3.13 Connecting a Battery
- 3.14 Flash Programming
- 3.15 MPU Firmware
- 3.16 Crystal Oscillator
- 3.17 Meter Calibration
- 4 Firmware Interface
- 4.1 I/O RAM and SFR Map – Functional Order
- 4.2 I/O RAM Description – Alphabetical Order
- 4.3 CE Interface Description
- 5 Electrical Specifications
- 5.1 Absolute Maximum Ratings
- 5.2 Recommended External Components
- 5.3 Recommended Operating Conditions
- 5.4 Performance Specifications
- 5.4.1 Input Logic Levels
- 5.4.2 Output Logic Levels
- 5.4.3 Power-Fault Comparator
- 5.4.4 Battery Monitor
- 5.4.5 Supply Current
- 5.4.6 V3P3D Switch
- 5.4.7 2.5 V Voltage Regulator
- 5.4.8 Low-Power Voltage Regulator
- 5.4.9 Crystal Oscillator
- 5.4.10 LCD DAC
- 5.4.11 LCD Drivers
- 5.4.12 Optical Interface
- 5.4.13 Temperature Sensor
- 5.4.14 VREF
- 5.4.15 ADC Converter, V3P3A Referenced
- 5.5 Timing Specifications
- 5.6 Typical Performance Data
- 5.7 71M6531D/F Package
- 5.8 71M6532D/F Package
- 5.9 Pin Descriptions
- 6 Ordering Information
- 7 Related Information
- 8 Contact Information
- Appendix A: Acronyms
- Appendix B: Revision History
Data Sheet 71M6531D/F-71M6532D/F FDS 6531/6532 005
82 Rev 2
Name
Location
Reset
Wake
Dir
Description
LCD_DAC[2:0]
20AB[3:1] 0 L R/W
LCD contrast control DAC. Adjusts the LCD voltage in steps of 0.2 V from V3P3SYS
(mission mode) or VBAT (BROWNOUT/LCD modes).
LCD_DAC[2:0]
Resulting LCD Voltage
000
V3P3 or VBAT
001
V3P3 or VBAT – 0.2V
010
V3P3 or VBAT – 0.4V
011
V3P3 or VBAT – 0.6V
100
V3P3 or VBAT – 0.8V
101
V3P3 or VBAT – 1.0V
110
V3P3 or VBAT – 1.2V
111
V3P3 or VBAT – 1.4V
LCD_E
2021[5] 0 L R/W
Enables the LCD display. When disabled, VLC2, VLC1 and VLC0 are ground as are
the COM and SEG outputs.
LCD_MODE[2:0]
2021[4:2] 0 L R/W
The LCD bias mode. Use the LCD DAC in ANACTRL to reduce saturation. The number
of states is the number of commons which are driven to multiplex the LCD.
LCD_MODE[2:0]
Function
Notes
000
4 states, ⅓ bias
⅓ bias modes can drive 3.3 V LCDs.
001
3 states, ⅓ bias
010
2 states, ½ bias
½ bias and static modes can drive
both 3.3 V and 5 V LCDs.
011
3 states, ½ bias
100
static display
LCD_ONLY
20A9[5] 0 0 W
Puts the part to sleep, but with the LCD display still active. LCD_ONLY is ignored if
system power is present. While in SLEEP mode, the device will wake up on reset,
when the autowake timer times out, when the push button is pushed, or when system
power returns.
LCD_SEG0[3:0]
…
LCD_SEG19[3:0]
2030[3:0]
…
2043[3:0]
0
…
0
L
…
L
R/W
…
R/W
LCD Segment Data. Each word contains information for 1 to 4 time divisions of each
segment. Some addresses are used to address two segments.
In each word, bit 0 corresponds to COM0, bit 1 to COM1, bit 2 to COM2 and bit 3 to
COM3 of the first segment. Bits 4 through 7 correspond to COM0 to COM3, respec-
tively, of the second segment.
Care should be taken when writing to LCD_SEG locations since some of them control
DIO pins.
LCD_SEG24[3:0]
…
LCD_SEG31[3:0]
2048[3:0]
…
204F[3:0]
0
…
0
L
…
L
R/W
…
R/W
LCD_SEG32[3:0]
2050[3:0] 0 L R/W