MAX6621AUB+ MAXIM [Maxim Integrated Products], MAX6621AUB+ Datasheet - Page 7

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

Table 2. CONFIG0 Register
The CONFIG0 register holds a bit mask for sockets and
domains that are enabled for polling as well as a
polling delay (minimum delay between sets of polls)
and features enable/disable bits. Table 2 shows the
various options for CONFIG0.
BIT(S)
15:8
2:0
15
14
13
12
11
10
9
8
7
6
5
4
3
Polling enable for sockets and domains
1 = enable socket 3, domain 1
1 = enable socket 3, domain 0
1 = enable socket 2, domain 1
1 = enable socket 2, domain 0
1 = enable socket 1, domain 1
1 = enable socket 1, domain 0
1 = enable socket 0, domain 1
1 = enable socket 0, domain 0
1 = enable I
0 = disable timeout
1 = alternate data representation
0 = 16-bit data representation
1 = enable I
(PEC) on device return data
0 = disable PEC
1 = mask temperature alerts
0 = activate alerts
Reserved, set to 0
Poll delay, see Table 3
_______________________________________________________________________________________
2
2
DESCRIPTION
C bus lockup timeout
C packet error checksum
CONFIG0
DEFAULT
00h
0
0
0
0
0
0
0
0
1
0
1
0
0
5
Table 3. Polling Delay
Table 4. CONFIG1 Register
The optional polling delay (bits 2:0) inserts after polling
the set of all sockets and domains that are enabled in
bits 15:8 with a minimal pause of 2.5ms between PECI
reads. After polling all enabled sockets and domains,
the device pauses PECI communications for the config-
ured time before starting to poll the set of enabled
sockets and domains again. Table 3 shows the various
polling delay options.
The CONFIG1 register configures the maximum num-
ber of retries before aborting a PECI temperature read
as well as the originated (suggested) PECI bit time.
Table 4 shows the various options for CONFIG1.
PECI-to-I
BIT(S)
POLL DELAY VALUE
15:8
7:0
Originated PECI bit time
(before negotiation)
01h: RESERVED
02h…0FFh: CONFIG1[15:8] + 1µs
Minimum: 02h (= 3µs / 333.3kHz)
Maximum: 0FFh (= 256µs / 3.906kHz)
Maximum number of retries for PECI
transactions
0
1
2
3
4
5
6
7
DESCRIPTION
2
C Translator
DELAY BETWEEN POLLS (ms)
Polling on request only
100 (default)
Reserved
500
2.5
10
50
5
CONFIG1
DEFAULT
02h
03h
7