General description
UM0527
24/66
1.1.17
Signals functions table
VDCDC
PD5
12
ADC analog input
Converter DC/DC output voltage
measurement signal
TX
PE0
44
SCI transmit data out
RS-232C TxD signal
RX
PE1
1
SCI receive data in
RS-232C RxD signal
CHOFF
PF0
15
digital output/active high
Battery charging mode control signal
BUZZER
PF1
16
digital output/active high
Buzzer signal
ACI
PF2
17
digital output/active high
Mains relay control signal
ON/OFF
PF4
18
digital output/active high
Power supply VDD on/off
SHD
PF6
19
output
Shutdown DC/DC converter signal
Unused
PF7
20
ICC_SEL
TST/V
PP
38
Input
ICC mode flash programming
RST!
RESET
39
input
Reset
OSC1
OSC1
42
Resonator oscillator inverter output
OSC2
OSC2
41
External clock input or resonator
oscillator inverter input
Table 5.
Microcontroller IN/OUT signals (continued)
Signal
name
Port
ST7
Pin no
ST7
Type/active state
Description
Table 6.
Signals functions table
Mains
mode
Boost
mode
Buck mode
Inverter
mode
Standby
mode
Standby
charge mode
Off mode
ACI
H
H
H
L
L
H
L
ACF!
H
H
H
L
L
H
L
ACL
L
H
L
L
L
L
L
ACH
L
L
H
L
L
L
L
OUT_REL
L/H
L/H
L/H
H
L
L
L
INV_A!
L
L
L
Active
L
L
L
INV_B!
L
L
L
Active
L
L
L
SHD
L
L
L
Active
L
L
L
TERM
Active
Active
Active
Active
Active
Active
Inactive
CHOFF
Active
Active
Active
H
L
Active
Inactive
BUZZER
Active
Active
Active
Active
Active
Active
Inactive
ON/OFF
H
H
H
H
H
H
L
BUTTON
Active
Active
Active
Active
Active
Active
Active
LEDR
Active
Active
Active
Active
Active
Active
Inactive
