ADM1169 Analog Devices, ADM1169 Datasheet - Page 29

• Manufacturer Part Number: ADM1169
• Description: Super Sequencer and Monitor with Margining Control and Non-Volatile Fault Recording
• Manufacturer: Analog Devices

Specifications of ADM1169

• # Supplies Monitored: 8
• Volt Monitoring Accuracy: 1%
• # Output Drivers: 8
• Fet Drive/enable Output: Both
• Voltage Readback: 12-bit ADC
• Supply Adj/margining: 12-bit ADC+4 DACs
• Package: 32 ld LQFP,40 ld LFCSP

SMBus PROTOCOLS FOR RAM AND EEPROM
The ADM1169 contains volatile registers (RAM) and nonvolatile
registers (EEPROM). User RAM occupies Address 0x00 to
Address 0xDF; and the EEPROM occupies Address 0xF800 to
Address 0xFBFF.
Data can be written to and read from both the RAM and the
EEPROM as single data bytes. Data can be written only to
unprogrammed EEPROM locations. To write new data to a
(CONTINUED)
(CONTINUED)
(CONTINUED)
(CONTINUED)
SDA
SDA
SCL
SCL
SDA
SCL
START BY
START BY
SDA
SDA
MASTER
SCL
MASTER
SCL
P
t
BUF
1
1
1
1
S
1
1
D7
D7
0
0
D6
D6
SLAVE ADDRESS
SLAVE ADDRESS
0
0
t
t
LOW
HD;STA
t
FRAME 1
FRAME 1
HD;DAT
D5
D5
1
1
D4
D4
1
1
t
DATA BYTE
DATA BYTE
R
FRAME 3
FRAME 3
A1
A1
D3
D3
Figure 36. General SMBus Write Timing Diagram
Figure 37. General SMBus Read Timing Diagram
A0
D2
A0
D2
Figure 38. Serial Bus Timing Diagram
t
SU;DAT
R/W
R/W
ACK. BY
ACK. BY
D1
D1
SLAVE
SLAVE
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9
9
D0
D0
MASTER
ACK. BY
t
HIGH
ACK. BY
t
SLAVE
F
1
1
9
D7
9
D7
D6
D6
programmed location, the location contents must first be erased.
EEPROM erasure cannot be done at the byte level. The EEPROM
is arranged as 32 pages of 32 bytes each, and an entire page must
be erased.
Page erasure is enabled by setting Bit 2 in the UPDCFG register
(Address 0x90) to 1. If this bit is not set, page erasure cannot occur,
even if the command byte (0xFE) is programmed across the SMBus.
1
1
D7
D7
D5
D5
COMMAND CODE
S
D4
D4
D6
D6
DATA BYTE
FRAME 2
FRAME 2
t
SU;STA
D5
D3
D5
D3
t
HD;STA
D4
D2
D4
DATA BYTE
DATA BYTE
D2
FRAME N
FRAME N
D3
D1
D3
D1
MASTER
ACK. BY
ACK. BY
D2
D0
D2
D0
SLAVE
9
9
D1
D1
t
SU;STO
D0
D0
NO ACK.
ACK. BY
SLAVE
9
9
P
MASTER
MASTER
STOP
STOP
BY
BY
ADM1169