32-bit ARM Cortex™-M3 MCU
HT32F1251/51B/52/53
Symbol
Parameter
Conditions
Min
—
—
—
4
Typ
400
400
400
—
Max
—
Unit
mV
mV
mV
mA
mA
mA
mA
3.3 V IO
Schmitt Trigger Input
Voltage Hysteresis
VHYS
5 V-tolerant IO
—
Reset pin
—
3.3 V 4 mA drive IO, VOL = 0.4 V
3.3 V 8 mA drive IO, VOL = 0.4 V
—
8
—
—
Low level output current 5 V-tolerant 8 mA drive IO, VOL=0.4V
(GPO Sink current)
8
—
—
IOL
5 V-tolerant 12 mA drive IO, VOL=0.4V
12
—
—
Backup Domain IO drive @ VBAT =3.3V,
VOL = 0.4 V, PB8, PB9, PB10.
—
—
1
mA
3.3V I/O 4 mA drive, VOH=VDD33-0.4V
3.3V I/O 8 mA drive, VOH=VDD33-0.4V
4
8
—
—
—
—
mA
mA
5 V-tolerant I/O 8 mA drive,
High level output
VOH = VDD33 - 0.4 V
current
(GPO Source current)
8
—
—
—
—
—
1
mA
mA
mA
IOH
5 V-tolerant I/O 12 mA drive,
VOH = VDD33 - 0.4 V
12
—
Backup Domain IO drive@VBAT=3.3V,
VOH = VDD33 - 0.4 V, PB8, PB9, PB10.
3.3 V 4 mA drive IO, IOL = 4 mA
3.3 V 8 mA drive IO, IOL = 8 mA
5 V-tolerant 8 mA drive IO, IOL=8mA
5 V-tolerant 12 mA drive IO, IOL=12mA
—
—
—
—
—
—
0.4
0.4
0.4
0.4
V
V
V
V
VOL
Low level output voltage
—
—
VDD33
0.4 V
-
3.3 V 4 mA drive IO, IOH = 4 mA
3.3 V 8 mA drive IO, IOH = 8 mA
—
—
—
—
—
—
—
—
V
V
V
V
VDD33
0.4 V
-
High level output
voltage
VOH
5 V-tolerant 8 mA drive IO,
IOH=8mA
VDD33
0.4 V
-
5 V-tolerant 12 mA drive IO,
IOH=12mA
VDD33
0.4 V
-
3.3 V I/O
34
38
29
35
—
—
—
—
74
89
kΩ
kΩ
kΩ
kΩ
RPU
RPD
Internal pull-up resistor
5 V-tolerant I/O
3.3 V I/O
86
Internal pull-down
resistor
5 V-tolerant I/O
107
Rev. 1.00
27 of 35
May 27, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
