HT68F20_11 Datasheet, PDF (182/244 Pages) Holtek Semiconductor Inc – Enhanced I/O Flash Type MCU with EEPROM

HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
UART Module Pin Description
Pin Name
RX
TX
SDI
SDO
SCK
SCS
CLKI
INT
I/O
Description
UART RX serial data input pin
I
If UARTEN=1 and RXEN=1, then RX is the UART serial data input
If UARTEN=0 or RXEN=0, then RX is high impedance
UART TX serial data output pin
O
If UARTEN=1 and TXEN=1, then TX is the UART serial data output
If UARTEN=0 or TXEN=0, then TX is high impedance
I
Slave SPI Serial Data In Input Signal
Internally connected to the MCU Master SPI SDO output signal
O
Slave SPI Serial Data Out Output Signal
Internally connected to the MCU Master SPI SDI input signal
I
Slave SPI Serial Clock Input Signal
Internally connected to the MCU Master SPI SCK output signal
Slave SPI Device Select Input Signal
I
Internally connected to the MCU Master SPI SCS output signal - connected to pull high
resistor
I
Clock Input Signal
Internally connected to the MCU Master PCK output signal
UART Interrupt Output Signal
O
Internally connected to the MCU Master PINT input signal
A UART related interrupt will generate a low pulse signal on this line
NC
¾
Implies that the pin is ²Not Connected² and can therefore not be used.
Notes: The pin description for all pins with the exception of the UART TX and RX pins are described in the preceding
MCU section.
UART Module D.C. Characteristics
Ta=25°C
Symbol
Parameter
I_DD1
Operating Current *
(SPI Enabled, UART disabled)
I_DD2
Operating Current *
(SPI enabled, UART enabled)
I_STB
Standby Current *
(SPI disabled, UART disabled)
V_IL
Input Low Voltage for RX Ports
V_IH
Input High Voltage for RX Ports
I_OL
TX Port Sink Current
I_OH
RX Port Source Current
Test Conditions
V_DD
Conditions
3.0V
f_CLKI=12MHz, SCK=f_CLKI/4,
Output no load
Min.
¾
5.0V
f_CLKI=16MHz, SCK=f_CLKI/4,
Output no load
¾
2.2V
f_CLKI=6MHz, SCK=f_CLKI/4,
Output no load
¾
5.0V
f_CLKI=12MHz, SCK=f_CLKI/4,
Output no load
¾
f_CLKI=16MHz, SCK=f_CLKI/4,
5.0V
SCS=V_DD, UARTEN=0,
TXEN=1, RXEN=1, SDI=H,
¾
RX=H, Output no load
¾
¾
0
¾
¾
0.7V_DD
3.0V
V_O=0.1V_DD
5.0V
2.5
10.0
3.0V
V_O=0.9V_DD
5.0V
-1.5
-5.0
Typ.
¾
¾
¾
¾
¾
¾
¾
5.0
25.0
-3.0
-8.0
Max.
1.0
2.0
4.2
4.8
0.6
0.3V_DD
V_DD
¾
¾
¾
¾
Unit
mA
mA
mA
mA
mA
V
V
mA
mA
mA
mA
Rev. 1.50
182
March 15, 2011