TLC156 Datasheet, PDF(11/50 Page) List of Unclassifed Manufacturers – EPROM/ROM-Based 8-Bit Microcontroller Series

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TLC156 Datasheet, PDF (11/50 Pages) List of Unclassifed Manufacturers – EPROM/ROM-Based 8-Bit Microcontroller Series

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TLC

TLC156

2.1.6 PORTA, PORTB & PORTC (Port Data Registers)

Address

05h (r/w)

06h (r/w)

07h (r/w)

Name

PORTA

PORTB

PORTC

IOB7

IOC7

IOB6

IOC6

IOB5

IOC5

IOB4

IOC4

IOA3

IOB3

IOC3

IOA2

IOB2

IOC2

IOA1

IOB1

IOC1

IOA0

IOB0

IOC0

Reading the port (PORTA, PORTB, PORTC register) reads the status of the pins independent of the pinâs

input/output modes. Writing to these ports will write to the port data latch.

PORTA is a 4-bit port data Register. Only the low order 4 bits are used (PORTA<3:0>). Bits 7-4 are unimplemented

and read as â0âs.

PORTB is a 8-bit port data register.

PORTC is a 8-bit port data register for TLC155/157, or a General Purpose Register for

TLC154/156.

2.1.7 PCON (Power Control Register)

Address

Name

08h (r/w) PCON WDTE EIS LVDTE ROC

Bit3:Bit0 : Not used. Read as â0âs.

ROC : R-option function of IOA0 and IOA1 pins enable bit.

= 0, Disable the R-option function.

= 1, Enable the R-option function. In this case, if a 430KÎ© external resister is connected/disconnected to Vss,

the status of IOA0 (IOA1) is read as â0â/â1â.

LVDTE : LVDT (low voltage detector) enable bit.

= 0, Disable LVDT.

= 1, Enable LVDT.

EIS : Define the function of IOB0/INT pin.

= 0, IOB0 (bi-directional I/O pin) is selected. The path of INT is masked.

= 1, INT (external interrupt pin) is selected. In this case, the I/O control bit of IOB0 must be set to â1â. The path

of Port B input change of IOB0 pin is masked by hardware, the status of INT pin can also be read by way

of reading PORTB.

WDTE : WDT (watch-dog timer) enable bit.

= 0, Disable WDT.

= 1, Enable WDT.

2.1.8 WUCON (Port B Input Change Interrupt/Wake-up Control Register)

Address

09h (r/w)

Name

WUCON

WUB7

WUB6

WUB5

WUB4

WUB3

WUB2

WUB1

WUB0

WUB0 : = 0, Disable the input change interrupt/wake-up function of IOB0 pin.

= 1, Enable the input change interrupt/wake-up function of IOB0 pin.

WUB1 : = 0, Disable the input change interrupt/wake-up function of IOB1 pin.

= 1, Enable the input change interrupt/wake-up function of IOB1 pin.

WUB2 : = 0, Disable the input change interrupt/wake-up function of IOB2 pin.

= 1, Enable the input change interrupt/wake-up function of IOB2 pin.

Rev0.95 Nov 20, 2003

P.2/TLC156

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