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
FDS 6531/6532 005 Data Sheet 71M6531D/F-71M6532D/F
Rev 2 53
1.5.17 Test Ports (TMUXOUT pin)
One of the digital or analog signals listed in Table 51 can be selected to be output on the TMUXOUT pin.
The function of the multiplexer is controlled with the I/O RAM field TMUX[4:0] (0x20AA[4:0]), as shown in
Table 51.
Table 51: TMUX[4:0] Selections
TMUX[4:0]
Mode
Function
0
Analog
GNDD
1
Analog
Reserved
2
Analog
GNDD
3
Analog
Reserved
4
Analog
PLL_2P5
5
Analog
Output of the 2.5 V low-power regulator
6
Analog
Internal VBIAS voltage (nominally 1.6V)
7
Analog
Not used
8 - 0x0F
–
Reserved
0x10
Digital
RTC 1-second output
0x11
Digital
RTC 4-second output
0x12
–
Not used
0x13
Digital
V1_OK comparator output
0x14
Digital
Real-time output (RTM) from the CE
0x15
Digital
WDTR_EN (Comparator 1 Output AND V1LT3)
0x16 – 0x17
–
Not used
0x18
Digital
RXD (from Optical interface, w/ optional inversion)
0x19
Digital
MUX_SYNC
0x1A
–
Not used
0x1B
Digital
CKMPU (MPU clock)
0x1C
Digital
Pulse output
0X1D
Digital
RTCLK (output of the oscillator circuit, nominally
32,786Hz)
0X1E
Digital
CE_BUSY (busy interrupt generated by CE, 396µs)
0X1F
Digital
XFER_BUSY (transfer busy interrupt generated by the
CE, nominally every 999.7ms)
The TMUXOUT pin may be used for diagnosis purposes or in production test. The RTC 1-second output
may be used to calibrate the crystal oscillator. The RTC 4-second output provides even higher precision.