Datasheet

LTC1960
14
1960fb
SSB
SCK
MOSI
MISO
1960 F02
BYTE 1 BYTE 2
Figure 2. SPI Read of FA = 0, LP = 0, DC = 1, PF = 0, and CH = 1
OPERATION
2-Byte SPI Read Format:
bit 7........byte 1.......bit 0 bit 7........byte 2............bit 0
MOSI 0 0 0 0 A0 A1 A2 0 0 0 0 0 A0 A1 A2 1
MISO X 0 0 0 0 A0 A1 A2 X FA LP DC PF CH X X
Status Address: A[2:0] = b010
Status Read Data: LP = LOW_POWER (Low power comparator output)
DC = DCDIV (DCDIV comparator output)
PF = POWER_FAIL (Set if selected power supply failed to hold up system power after
three tries)
CH = CHARGING (One or more batteries are being charged)
FA = FAULT. This bit is set for any of the following conditions:
1) The LTC1960 is still in power-on reset.
2) The LTC1960 has detected a short circuit and has shut down power and charging.
3) The system has asserted a fast off using DCDIV.
Note: All other values of A[2:0] are reserved and must not be used.
A status read is illustrated in Figure 2.