LCD Type MCU
HT49RU80/HT49CU80
Pad Name
I/O
Options
Description
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
Bidirectional 8-bit input/output port. Each pin on this
port can be configured as a wake-up input by a con-
figuration option. Configuration options determine
whether pins PA0~PA3 are configured as CMOS out-
Wake-up
puts or NMOS input/output pins. If PA0~PA3 are con-
CMOS or NMOS figured as NMOS input/output pins, then pull-high
I/O
Pull-high
options are available but apply to all 4 pins, not indi-
PA0/PA1 or BZ/BZ vidual pins. Pins PA4~PA7 are always configured as
PA3 or PFD
NMOS input/output pins with pull-high resistors con-
nected. All inputs are Schmitt Trigger types. Pins
PA0, PA1 and PA3 are pin-shared with BZ, BZ and
PFD respectively, the function of which is chosen via
configuration options.
8-bit Schmitt Trigger input port. Each input pin is con-
nected to an internal pull-high resistor. Pins PB0 and
PB1 are pin-shared with INT0 and INT1 respectively.
Pins PB2, PB3 and PB4 are pin-shared with TMR0,
TMR1 and TMR2 respectively.
Bidirectional 8-bit input/output port. Two configura-
tion options determine whether the four pins
PC0~PC3 and the four pins PC4~PC7 are configured
as CMOS outputs or NMOS input/output pins. Pins
must be configured as CMOS outputs or NMOS in-
put/output pins in blocks of four pins, individual pins
cannot be selected. If pins PC0~PC3 or PC4~PC7
are configured as NMOS input/output pins, then a
pull-high option is available for each block of four
pins. Individual pins cannot be selected to have a
pull-high option. All inputs are Schmitt Trigger types.
Pins PC0 and PC1 are pin-shared with UART pins TX
and RX respectively.
7-bit output port. Each pin can be setup as either a
CMOS output or a SEG output via configuration op-
tions.
LCD power supply. This pad is implemented for LCD
power only. The VLCD levels can be greater or less
than the VDD levels.
IC maximum voltage, connect to VDD, VLCD or V1.
LCD voltage pump
PB0/INT0
PB1/INT1
PB2/TMR0
PB3/TMR1
PB4/TMR2
PB5~PB7
I
¾
PC0/TX
PC1/RX
PC2~PC7
I/O
CMOS or NMOS
Pull-high
PD0/SEG40~
O
PD6/SEG46
CMOS Output
or SEG Output
VLCD
I
¾
I
¾
¾
¾
VMAX
V1, V2, C1, C2
14
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