Input/Output Ports - Holtek TinyPower HT69F40A Manual

TinyPower

Input/Output Ports

Holtek microcontrollers offer considerable flexibility on their I/O ports. With the input or output
designation of every pin fully under user program control, pull-high selections for all ports and
wake-up selections on certain pins, the user is provided with an I/O structure to meet the needs of a
wide range of application possibilities.
The device provides bidirectional input/output lines labeled with port names PA~PH. These I/O
ports are mapped to the RAM Data Memory with specific addresses as shown in the Special Purpose
Data Memory table. All of these I/O ports can be used for input and output operations. For input
operation, these ports are non-latching, which means the inputs must be ready at the T2 rising edge
of instruction "MOV A, [m]", where m denotes the port address. For output operation, all the data is
latched and remains unchanged until the output latch is rewritten.
I/O Port Register List
HT69F30A
Register
Name
7
PAWU PAWU7
PAPU PAPU7
PA PA7
PAC PAC7
PBPU —
PB —
PBC —
PCPU —
PC —
PCC —
PDPU PDPU7
PD PD7
PDC PDC7
PEPU PEPU7
PE PE7
PEC PEC7
PFPU PFPU7
PF PF7
PFC PFC7
Rev. 1.20
HT69F30A/HT69F40A/HT69F50A
I/O Flash 8-Bit MCU with LCD & EEPROM
TM
Bit
6 5 4
PAWU6 PAWU� PAWU4
PAPU6 PAPU� PAPU4
PA6 PA� PA4
PAC6 PAC� PAC4
— — —
— — —
— — —
— — —
— — —
— — —
PDPU6 PDPU� PDPU4
PD6 PD� PD4
PDC6 PDC� PDC4
PEPU6 PEPU� PEPU4
PE6 PE� PE4
PEC6 PEC� PEC4
PFPU6 PFPU� PFPU4
PF6 PF� PF4
PFC6 PFC� PFC4
7�
3 2 1
PAWU3 PAWU2 PAWU1
PAPU3 PAPU2 PAPU1
PA3 PA2 PA1
PAC3 PAC2 PAC1
PBPU3 PBPU2 PBPU1
PB3 PB2 PB1
PBC3 PBC2 PBC1
— PCPU2 PCPU1
— PC2 PC1
— PCC2 PCC1
PDPU3 PDPU2 PDPU1
PD3 PD2 PD1
PDC3 PDC2 PDC1
PEPU3 PEPU2 PEPU1
PE3 PE2 PE1
PEC3 PEC2 PEC1
PFPU3 PFPU2 PFPU1
PF3 PF2 PF1
PFC3 PFC2 PFC1
��to�e� 0�� 201�
0
PAWU0
PAPU0
PA0
PAC0
PBPU0
PB0
PBC0
PCPU0
PC0
PCC0
PDPU0
PD0
PDC0
PEPU0
PE0
PEC0
PFPU0
PF0
PFC0