3 serial interface status register, Ata6264 [preliminary – Atmel ATA6264 User Manual
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4929B–AUTO–01/07
ATA6264 [Preliminary]
22.3
Serial Interface Status Register
For all serial interface commands except the test-mode commands (55AAh, AA55h, 5500h), the
ATA6264 status is available at the MISO line. For the status register a 16-bit structure is used,
one bit for each information.
Table 22-10. Status Register
Byte A
Byte B
MSBit
LSBit MSBit
LSBit
a7
a6
a5
a4
a3
a2
a1
a0
b7
b6
b5
b4
b3
b2
b1
b0
Table 22-11. Information Provided by the Itemized Bits of the Status Register
Bit
Set To
Information
a7
High
Chip temperature reports overtemperature
Low
Chip temperature reports normal temperature
a6
High
Overtemperature at K1 output
Low
Normal temperature at K1 output
a5
High
Overtemperature at K2 output
Low
Normal temperature at K2 output
a4
High
Latch for GKEY function is set
Low
Latch for GKEY function is not set
a3
High
EVZ switched to 33V, EVZ switched to external divider
Low
EVZ switched to 23V
a2
High
CP-OUT switch is low impedance
Low
CP-OUT switch is high ohmic
a1
High
CP-OUT voltage too low
Low
CP-OUT voltage is in correct voltage range
a0
High
CP voltage too low
Low
CP voltage is in correct voltage range
b7
High
Voltage at pin USP above detection threshold
Low
Voltage at pin USP below detection threshold
b6
High
GNDA or GNDB disconnected
Low
GNDA and GNDB connected
b5
High
Previously sent serial interface command was invalid (default after power-on reset)
Low
Previously sent serial interface command was valid
b4
High
Error during last serial interface transmission (default after power-on reset)
Low
No error during last serial interface transmission
b3
High
IC is in Test mode
Low
IC is in Normal mode
b2
Reflects bit b2 of the watchdog prescaler
b1
Reflects bit b1 of the watchdog prescaler
b0
Reflects bit b0 of the watchdog prescaler