BH66F2260 Datasheet, PDF(73/214 Page) Holtek Semiconductor Inc – R-Sensor Blood Pressure Meter Flash MCU

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BH66F2260 Datasheet, PDF (73/214 Pages) Holtek Semiconductor Inc – R-Sensor Blood Pressure Meter Flash MCU

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BH66F2260

R-Sensor Blood Pressure Meter Flash MCU

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~PE. 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.

Name

PAC

PAPU

PAWU

PBC

PBPU

PCC

PCPU

PDC

PDPU

PEC

PEPU

PA7

PAC7

PAPU7

PAWU7

PC7

PCC7

PCPU7

Bit

PA6

PA5

PA4

PA3

PA2

PA1

PA0

PAC6

PAPU6

PAC5

PAPU5

PAC4

PAPU4

PAC3

PAPU3

PAC2

PAPU2

PAC1

PAPU1

PAC0

PAPU0

PAWU6 PAWU5 PAWU4 PAWU3 PAWU2 PAWU1 PAWU0

PB6

PBC6

PB5

PBC5

PB4

PBC4

PB3

PBC3

PB2

PBC2

PB1

PBC1

PB0

PBC0

PBPU6 PBPU5 PBPU4 PBPU3 PBPU2 PBPU1 PBPU0

PC6

PCC6

PC5

PCC5

PC4

PCC4

PC3

PCC3

PC2

PCC2

PC1

PCC1

PC0

PCC0

PCPU6 PCPU5 PCPU4 PCPU3 PCPU2 PCPU1 PCPU0

PD5

PD4

PD3

PD2

PD1

PD0

PDC5 PDC4 PDC3 PDC2 PDC1 PDC0

PDPU5 PDPU4 PDPU3 PDPU2 PDPU1 PDPU0

PE3

PE2

PE1

PE0

PEC3 PEC2 PEC1 PEC0

PEPU3 PEPU2 PEPU1 PEPU0

"â": Unimplemented, read as "0"

I/O Logic Function Registers List

Pull-high Resistors

Many product applications require pull-high resistors for their switch inputs usually requiring the

use of an external resistor. To eliminate the need for these external resistors, all I/O pins, when

configured as an input have the capability of being connected to an internal pull-high resistor. These

pull-high resistors are selected using registers, namely PAPU~PEPU, and are implemented using

weak PMOS transistors.

Note that the pull-high resistor can be controlled by the relevant pull-high control register only

when the pin-shared functional pin is selected as an input or NMOS output. Otherwise, the pull-high

resistors cannot be enabled.

Rev. 1.00

March 15, 2017

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