HT85F2270 datasheet(129/226 Pages) HOLTEK

129 / 226 page

Rev. 1.00

1�9 of ��6

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Timer 0/Timer 1/Timer 3 Register Description

Overall operation of the Timer 0, Timer 1 and Timer 3 are controlled using the registers listed in

the accompanying table. A register pair, TLn and THn, exist to store the internal counter 13-bit or

16-bit value. The TCON, IRCON, IEN0, IEN1 registers include the TIMERn interrupt control and

interrupt request flags, which are described in the Interrupt section. The remaining registers are

control registers which setup the different operating and control modes as well as the clock source

control bits.

Timer0/Timer1/Timer3 Register List

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IEN0

EAL

WDT

ET�

ES0

ET1

EX1

ET0

EX0

IEN1

EXEN�

SWDT

ET�

EC�P

EX6

EX�

EX4

EX�

IRCON

EXF�

TF�

IEX6

IEX�

IEX4

IEX�

—

T�OD

GATE1

C/T1

T1�1

T1�0

GATE0

C/T0

T0�1

T0�0

TCON

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

T�CON

GATE�

C/T�

T��1

T��0

—

TF�

TR�

TLn

D�

THn

D1�

D14

D1�

D11

D10

T�PRE

T�PRE1

T�PRE0

T�PRE1

T�PRE0

T1PRE1

T1PRE0

T0PRE1

T0PRE0

Note: n=0� 1� �

TL0 Register

SFR Address: 8Ah

● 16-bit

Bit

Name

D�

R/W

POR

Bit 7~0

TL0: TIMER0 Counter Low Byte Register bit 7~bit 0

● 13-bit

Bit

Name

—

D�

R/W

—

R/W

POR

—

Bit 7~5

Unimplemented, read as “0”

Bit 4~0

TL0: TIMER0 Counter Low Byte Register bit 4~bit 0

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