User`s manual

37
Sub-MCU
MD control
circuit
Monitoring
circuit
LPT16244
MD_CLK
Vcc
47 kΩ
PM0-PM4
User system
VBUS
MD_CLK
DrVss
DrVss
PM0-PM4
VBUS
DrVcc DrVcc
USD-
USD-
USD+
USD+
Power-supply
circuit
EPM7128
1 kΩ
P23
P27
P23
P27
SN74CB3Q3306A
SN74CB3Q3306A
MCU
User system
MCU
User system
Sub-MCU
P14
P14
SN74CB3Q3306A
TXD
SN74CB3Q3306A
MCU
VHC244
UHC14
_RES
Vcc
User system
EPM7128
EPM7128
_RES
47 kΩ
Figure 3.4 User System Interface Circuits (with HS1653ECN61H Connected)