ltc6803g-4 Linear Technology Corporation, ltc6803g-4 Datasheet - Page 27

• Manufacturer Part Number: ltc6803g-4
• Description: Ltc6803-2/ltc6803-4 - Multicell Battery Stack Monitor
• Manufacturer: Linear Technology Corporation

OPERATION
Start Cell Voltage ADC Conversions and Poll Status (Broadcast Command with Toggle Polling)
Poll Interrupt Status (Level Polling)
1. Pull CSBI low
2. Send STCVAD command and its PEC byte (all devices in stack start ADC conversions simultaneously)
3. SDO output of all devices in parallel pulled low for approximately 12ms
4. SDO output toggles at 1kHz rate, indicating conversions complete for all devices
5. Pull CSBI high to exit polling
1. Pull CSBI low
2. Send Address and PEC bytes for bottom device
3. Send PLINT command and PEC bytes
4. SDO output from bottom device pulled low if any device has an interrupt condition; otherwise, SDO high
5. Pull CSBI high to exit polling
6. Repeat steps 1-5 for middle device and top device
(n = 1 TO 12)
CSBI
SCKI
SDI
Sn
Figure 7. S Pin Action and SPI Transmission
WRCFG + CFGR + PEC
t
d
LTC6803-2/LTC6803-4
Sn, DISCHARGE PIN STATE
t
d
< 2µs IF Sn IS UNLOADED
680324 F07
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