32-bit ARM Cortex™-M3 MCU
HT32F1251/51B/52/53
Holtek HT32F1251/52/53
LQFP48
AF0
AF0
AF3
AF2
AF1
48 47 46 45 44 43 42 41 40 39 38 37
AF1
AF2
AF3
(Default)
(Default)
AP
AP P33 P33 33V 33V 33V 33V 33V 33V
P18
33V
33V
5VT
5VT
5VT
5VT
P33
P33
P33
5VT
5VT
5VT
AP
V
SSA_2
1
2
36 XTALOUT
PB1
PB0
-
-
-
33V
33V
33V
33V
33V
33V
33V
33V
5VT
5VT
5VT
P18
GT0_Ch3
GT0_CH2
GT0_CH1
GT0_CH0
GT1_ETI
-
ADC_IN0
ADC_IN1
ADC_IN2
ADC_IN3
ADC_IN4
ADC_IN5
ADC_IN6
ADC_IN7
-
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
35
34
33
32
31
30
29
28
27
26
25
XTALIN
PB15
-
P33
3
SPI_MOSI
UR_RI
GT1_CH0
GT1_CH1
GT1_CH2
GT1_CH3
3.3 V Digital Power Pad
UR_DCD
UR_DSR
4
PB14
SPI_MISO UR_DTR
AP
3.3 V Analog Power Pad
5
PB13
SPI_SCK
SPI_SEL
UR_DSR
UR_DCD
P18
SPI_MOSI UR_DTR
6
PB12
1.8 V Power Pad
SPI_MISO
UR_RI
7
V
SS33_3
SS33_2
33V
3.3 V I/O Pad
UR_RTS
/TXE
UR_CTS
SPI_SCK
8
V
5VT
SPI_SEL
9
VDD33_2
5 V Tolerance I/O Pad
/SCK
TRACE
SWO
-
-
-
UR_RX
PA8
10
11
12
PA15
PA14
PA13
-
-
-
GT0_CH0
GT0_CH1
GT0_CH2
High Current Output
5VT
PA9-
BOOT0
PA10-
5 V Tolerance I/O Pad
UR_TX
-
-
SWCLK
-
SWDIO
BOOT1
P33 P33 5VT P33 33V 33V 5VT 5VT 5VT 5VT
13 14 15 16 17 18 19 20 21 22 23 24
Figure 5. HT32F1251/52/53 48LQFP Pin Assignment
Rev. 1.00
19 of 35
May 27, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
