LTC6803-2/LTC6803-4
25
680324fa
OPERATION
Table 16. Memory Bit Descriptions
NAME DESCRIPTION VALUES
CDC Comparator Duty Cycle
CDC
UV/OV COMPARATOR
PERIOD
V
REF
POWERED DOWN
BETWEEN MEASUREMENTS
CELL VOLTAGE
MEASUREMENT TIME
0
(Default)
N/A (Comparator Off)
Standby Mode
Yes N/A
1 N/A (Comparator Off) No 13ms
2 13ms No 13ms
3 130ms No 13ms
4 500ms No 13ms
5 130ms Yes 21ms
6 500ms Yes 21ms
7 2000ms Yes 21ms
CELL10 10-Cell Mode 0 = 12-cell mode (default); 1 = 10-cell mode
LVLPL Level Polling Mode 0 = toggle polling (default); 1 = level polling
GPIO1 GPIO1 Pin Control
Write: 0 = GPIO1 pin pull-down on; 1 = GPIO1 pin pull-down off (default)
Read: 0 = GPIO1 pin at logic ‘0’; 1 = GPIO1 pin at logic ‘1’
GPIO2 GPIO2 Pin Control
Write: 0 = GPIO2 pin pull-down on; 1 = GPIO2 pin pull-down off (default)
Read: 0 = GPIO2 pin at logic ‘0’; 1 = GPIO2 pin at logic ‘1’
WDT Watchdog Timer Read: 0 = WDTB pin at logic ‘0’; 1 = WDTB pin at logic ‘1’
DCCx Discharge Cell x
x = 1..12 0 = turn off shorting switch for cell ‘x’ (default); 1 = turn on shorting switch
V
UV
Undervoltage Comparison Voltage* Comparison voltage = (V
UV
–31) • 16 • 1.5mV (Default V
UV
= 0)
V
OV
Overvoltage Comparison Voltage* Comparison voltage = (V
OV
–32) • 16 • 1.5mV (Default V
OV
= 0)
MCxI Mask Cell x Interrupts
x = 1..12 0 = enable interrupts for cell ‘x’ (default)
1 = turn off interrupts and clear flags for cell ‘x’
CxV Cell x Voltage*
x = 1..12 12-bit ADC measurement value for cell ‘x’
cell voltage for cell ‘x’ = (CxV –512) • 1.5mV
reads as 0xFFF while A/D conversion in progress
CxUV Cell x Undervoltage Flag
x = 1..12 cell voltage compared to V
UV
comparison voltage
0 = cell ‘x’ not flagged for undervoltage condition; 1 = cell ‘x’ flagged
CxOV Cell x Overvoltage Flag
x = 1..12 cell voltage compared to V
OV
comparison voltage
0 = cell ‘x’ not flagged for overvoltage condition; 1 = cell ‘x’ flagged
ETMPx External Temperature Measurement* Temperature measurement voltage = (ETMPx –512) • 1.5mV
THSD Thermal Shutdown Status
0 = thermal shutdown has not occurred; 1 = thermal shutdown has occurred
Status cleared to ‘0’ on read of Thermal Register Group
REV Revision Code Device revision code
ITMP Internal Temperature Measurement* Temperature measurement voltage = (ITMP –512) • 1.5mV = 8mV • T(°K)
PEC Packet Error Code Cyclic redundancy check (CRC) value
REF Reference Voltage for Diagnostics This reference voltage = (REF –512) • 1.5mV. Normal range is within 2.1V to 2.9V
*Voltage equations use the decimal value of the registers, 0 to 4095 for 12-bit and 0 to 255 for 8-bit registers
