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HT66FM5440
Brushless DC Motor A/D Flash MCU
HT66FM5440
Brushless DC Motor A/D Flash MCU
Block Diagram
HIRC
16MHz
LIRC
32kHz
MU
X
Clock System
HT8 MCU Core
Reset
Circuit
Interrupt
Controller
INT1
ROM
4K×16
LVD/LVR
Watchdog
Timer
RAM
384×8
Stack
8-Level
HT8-1T
SYSCLK
Bu
s
Digital Peripherals
TM3
Time Base
12-bit
ADC
MU
X
Pin-Shared
With Port A,B&D
AV
DD
AN0~AN3,
AN6&AN7
TM2
TM1
TM0
Pin-Shared
&
Pin-Remapping
Function
Port A
Driver
Port B
Driver
Port C
Driver
Port D
Driver
PA0~PA7
PB0~PB7
PC0~PC5
PD0~PD3
VDD&AVDD
VSS&AVSS
V
DD
BLDC Motor Control Peripherals
: Pin-Shared Node
OPA1P
AP
Pin-Shared
With Port A
MUX
OPA1
OPA2
OPA0
Unity
Gain
8-bit
DAC
+
-
Over Current
Detection Circuit
ADBYPS
Analog
Digital
Converter
UART
I
2
C
Noise
Filter
NFIN
Pin-Shared
With Port A&B
Position Detection Circuit
MUX
+
+
+
-
Hall Noise
Filter
Motor
Protect
Circuit
Motor
Control
Circuit
Pin-Shared
With Port A&B
Pin-Shared
With Port C
Pin-Shared
With Port A
GAT
GAB
GBT
GBB
GCT
GCB
H1
H2
H3
C1P~
C3P
C1N~
C3N
Pin-Shared
With Port B
OPA1N
OPA1O
OPA2P
OPA2N
OPA2O
CMP0
Analog Peripherals
+
-
+
-
AV
DD
V
SS
AV
SS
CAPTM
8/16-bit
MDUs
Pin Assignment
PA6/OPA1O/C1N/AN�
PA�/OPA�O/NFIN/AN6
PD0/TP0_0/TCK0/OPA1N/AN0
PD1/TP0_1/OPA1P/AN1
VSS & AVSS
VDD & AVDD
PA1/TCK�/AP/AN3
PD�/TP1_0/INT1/OPA�N
PD3/TP1_1/OPA�P
PB1/CTIN/HBO/SCL
PB�/TP3_1/HCO/SDA
PB0/INT1/NFIN/TP3_0/HAO/TCK3
PC0/GAT
PC1/GAB
PA5/C3P/H3
PA4/C�P/H�/C1N
PA3/C1P/H1/TCK1
PB3/C1N/CPN
PB5/TP�_1/C�N
PB4/TP�_0/C3N
PB�/TP�_1/TX/AN�
PB6/TP�_0/RX/OPA0O
PA�/SCL/TX/ICPCK/OCDSCK
PA0/SDA/RX/ICPDA/OCDSDA
PC5/GCB
PC4/GCT
PC3/GBB
PC�/GBT
HT66FM5440/HT66VM5440
28 SSOP-A
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Note: 1. If the pin-shared pin functions have multiple outputs, the desired pin-shared function is determined by
corresponding software control bits.
2. The OCDSDA and OCDSCK pins are supplied for the OCDS dedicated pins and as such only available
for the HT66VM5440 device which is the OCDS EV chip for the HT66FM5440 device.
3. The "VDD&AVDD" means that the VDD and AVDD are internally bonded while the "VSS&AVSS"
means that the VSS and AVSS are internally bonded.