Rev. 1.00
24
September 11, 2018
Rev. 1.00
25
September 11, 2018
HT45F4050
A/D NFC Flash MCU
HT45F4050
A/D NFC Flash MCU
Software Controlled LCD Driver Electrical Characteristics
Ta=-40°C~85°C, unless otherwise specified
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
I
BIAS
V
DD
/2 Bias Current for LCD
3V
ISEL[1:0]=00B
10.5
15
19.5
μA
5V
17.5
25
32.5
3V
ISEL[1:0]=01B
21
30
39
5V
35
50
65
3V
ISEL[1:0]=10B
42
60
78
5V
70
100
130
3V
ISEL[1:0]=11B
82.6
118
153.4
5V
140
200
260
V
SCOM
V
DD
/2 Voltage for LCD COM Port 2.2V~5.5V No load
0.475V
DD
0.5V
DD
0.525V
DD
V
Power on Reset Characteristics
Ta=-40°C~85°C, unless otherwise specified
Symbol
Parameter
Test Conditions
Min.
Typ. Max. Unit
V
DD
Conditions
V
POR
V
DD
Start Voltage to Ensure Power-on Reset
—
—
—
—
100
mV
RR
POR
V
DD
Rising Rate to Ensure Power-on Reset
—
—
0.035
—
—
V/ms
t
POR
Minimum Time for V
DD
Stays at V
POR
to Ensure
Power-on Reset
—
—
1
—
—
ms
V
DD
t
POR
RR
POR
V
POR
Time
System Architecture
A key factor in the high-performance features of the Holtek range of microcontrollers is attributed to
their internal system architecture. The range of the device take advantage of the usual features found
within RISC microcontrollers providing increased speed of operation and enhanced performance.
The pipelining scheme is implemented in such a way that instruction fetching and instruction
execution are overlapped, hence instructions are effectively executed in one or two cycles for most
of the standard or extended instructions respectively. The exceptions to this are branch or call
instructions which need one more cycle. An 8-bit wide ALU is used in practically all instruction set
operations, which carries out arithmetic operations, logic operations, rotation, increment, decrement,
branch decisions, etc. The internal data path is simplified by moving data through the Accumulator
and the ALU. Certain internal registers are implemented in the Data Memory and can be directly
or indirectly addressed. The simple addressing methods of these registers along with additional
architectural features ensure that a minimum of external components is required to provide a
functional I/O and A/D control system with maximum reliability and flexibility. This makes the
device suitable for low-cost, high-volume production for controller applications.