Mindray M8 User Manual

4-16 Product Principle
5 PWR_OK# Sent out by power management FPGA to CPU
board, indicates that the 12V is powered on.
 Power supply of main unit/battery enables the start of device.
 Power supply produces 5VSTB and 3.3VSTB as the AC inputs.
 Unplug AC when shutting down the device. Power supply cuts off 5VSTB output, but only
keeps the output of 3.3VSTB. Only with power button pressed again, it’s re-powered on.
 Unplug AC when the device is in standby. Batteries, for standby usage, provide the output of
5VSBT and 3.3VSTB.
 The process of power-on is shown below:
Connect to AC
Press power button
(control panel)
Receive valid
PWR_BTN_N
（power supply mgmt
FPGA）
Power supply mgmt
sends valid PWRBTN#
signal
S3# and S4#invalid
（COME module
sends）
DC-DC 12V power-on
PWR_OK valid
（power supply mgmt
sends）
CPU start
（COME module）
DC-DC board sends
power supply of other
circuits
Figure 4-16 Diagram of system power-on

Mindray M8 Specifications

General

Brand	Mindray
Model	M8
Category	Medical Equipment
Language	English