2.1 Overview for Control block
This product has built-in RAM and ROM.
Based on the memory parameter, controlling power supply and PMBus communication
are implemented. Conceptual diagram shown in figure 2-1.
2.2 RAM
2.2.1 Operating memory
When power supply is being operated, it refers to setting value of operating memory
with RAM and control it. Since setting change by PMBus communication command is
preserved in operating memory, the setting will be lost after a reset unless they are stored
to data flash.
2.2.2 STATUS memory
You can check status of power supply by reading status memory(command [ 78h ]-[ 7Eh ]).
Corresponding bit on Status memory is set to 1 when power supply has something abnormal.
It will be clear by implementing command of CLEAR_FAULTS [ 03h ], blocking input voltage,
stopping ON/OFF operation (refer to clause 6.1).
Figure 2-1 Conceptual diagram of communication control
2.1 Pin configuration
2. PMBus communication control
CHS (Slave device)
Microcontroller
RAM
ROM
Master device
Control
User store
Memory
(EEPROM)
Operating
Memory
Clear
Read
STATUS
Memory
Read operating status
PMBus communication with master device
Converter circuit
Sense operating information
Control Signal
Parameter change
PMBus Interface
PMBus
Capture
Refer
parameter
Operating information Update
Status
Update
Data check
Default store
Memory
(Data ROM)
Recover
Recover
Applications manual
For CHS300/400/500-
I
series
- 6 -
