MAX6621AUB+ MAXIM [Maxim Integrated Products], MAX6621AUB+ Datasheet - Page 12

• Manufacturer Part Number: MAX6621AUB+
• Description: PECI-to-I2C Translator
• Manufacturer: MAXIM [Maxim Integrated Products]

Error codes are represented as 16-bit words in the
8000h–81FFh range as shown in Table 14.
Table 14. Error Codes
The MAX6621 asserts ALERT when a PECI temperature
exceeds a configurable threshold after averaging.
Table 15 below shows the registers that set the thresh-
old and read the alert temperature for each socket. If
there are no active alerts, an error is returned as shown
in Table 14. If polling is disabled, the alert temperatures
are only checked when the request polling command is
called.
Once ALERT is asserted, a subsequent drop in temper-
ature does not clear the alert. ALERT must be cleared
by calling the clear alert command.
PECI-to-I
12
ERROR
CODES
8000h–
80FFh
8100h
8101h
8102h
8103h
8104h
______________________________________________________________________________________
Refer to Intel PECI specification.
PECI transaction failed for more than the
configured number of consecutive retries.
Polling disabled for requested socket/domain.
First poll not yet completed for requested
socket/domain (on startup).
Read maximum temperature requested, but no
sockets/domains enabled or all enabled
sockets/domains have errors; or read maximum
temperature address requested, but read
maximum temperature was not called.
Get alert socket/domain requested, but no alert
active.
2
C Translator
DESCRIPTION
ALERT Output
Error Codes
The clear alert is shown in Table 16, and this command
clears an active alert. If the temperature still exceeds
one of the thresholds after clearing, ALERT reasserts
on the next PECI temperature read. New alerts are dis-
abled when mask alerts (CONFIG0, bit 4) is set. This
does not affect an existing alert. The clear alert com-
mand needs to be called to clear it.
Table 17 shows the read alert socket/domain com-
mand. Call this command to check for the socket/
domain (register) that caused the alert to become
active. If multiple temperatures exceed their respective
thresholds, only the first violation is recorded. Register
address is held in low byte.
Table 15. Read/Write Temperature Alert
Commands
Table 16. Clear Alert
Table 17. Read Alert Socket/Domain
COMMAND
COMMAND
COMMAND
10h
11h
12h
13h
15h
0Bh
Read/write alert
temperature for
socket 0
Read/write alert
temperature for
socket 1
Read/write alert
temperature for
socket 2
Read/write alert
temperature for
socket 3
Clear alert
Read alert socket
and domain
DESCRIPTION
DESCRIPTION
DESCRIPTION
Read Alert Socket/Domain
ReadWord
ReadWord/
ReadWord/
ReadWord/
ReadWord/
WriteWord
WriteWord
WriteWord
WriteWord
TYPE
TYPE
Clear Alert
16-bit word
DEFAULT
SendByte
RESULT
TYPE
7FFFh
7FFFh
7FFFh
7FFFh