LTC6802-2
23
68022fa
applicaTions inForMaTion
Table 15. 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
*when MMB pin is low, the CDC value is set to 5
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 Only: 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
VUV
Undervoltage Comparison Voltage*
Comparison voltage = VUV * 16 * 1.5mV
(default VUV=0. When MMB pin is low a factory programmed comparison voltage is used)
VOV Overvoltage Comparison Voltage*
Comparison voltage = VOV * 16 * 1.5mV
(default VOV=0. When MMB pin is low a factory programmed comparison voltage is used)
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 * 1.5mV
reads as 0xFFF while A/D conversion in progress
CxUV
Cell x Undervoltage Flag
x=1..12 cell voltage compared to VUV comparison voltage
0=cell ‘x’ not flagged for under voltage condition; 1=cell ‘x’ flagged
CxOV
Cell x Overvoltage Flag
x=1..12 cell voltage compared to VOV comparison voltage
0=cell ‘x’ not flagged for over voltage condition; 1=cell ‘x’ flagged
ETMPx
External Temperature Measurement* Temperature measurement voltage = ETMPx * 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 * 1.5mV = 8mV * T(°K)
PEC Packet Error Code CRC value for reads
*Voltage determinations use the decimal value of the registers, 0 to 4095 for 12-bit and 0 to 255 for 8-bit registers.