Siemens EF 88H Series Manual de usuario descargar pdf (Pagina 49)

Semiconductor Group 6-15

On-Chip Peripheral Components

C501

6.2.1.1 Timer/Counter 0 and 1 Registers

Totally six special function registers control the timer/counter 0 and 1 operation :

– TL0/TH0 and TL1/TH1 - counter registers, low and high part

– TCON and TMOD - control and mode select registers

Special Function Register TL0 (Address 8A

) Reset Value : 00

Special Function Register TH0 (Address 8C

) Reset Value : 00

Special Function Register TL1 (Address 8B

) Reset Value : 00

Special Function Register TH1 (Address 8D

) Reset Value : 00

Bit Function

TLx.7-0

x=0-1

Timer/counter 0/1 low register

THx.7-0

x=0-1

Timer/counter 0/1 high register

.7 .6 .5 .48A

TL0

Bit No.

76543210

MSB LSB

.3 .2 .1 .0

.7 .6 .5 .48C

TH0.3 .2 .1 .0

.7 .6 .5 .48B

TL1.3 .2 .1 .0

.7 .6 .5 .48D

TH1.3 .2 .1 .0

Operating Mode Description

0 “TLx” holds the 5-bit prescaler value.

1 “TLx” holds the lower 8-bit part of the 16-bit timer/counter value.

2 “TLx” holds the 8-bit timer/counter value.

3 TL0 holds the 8-bit timer/counter value; TL1 is not used.

Operating Mode Description

0 “THx” holds the 8-bit timer/counter value.

1 “THx” holds the higher 8-bit part of the 16-bit timer/counter valu

2 “THx” holds the 8-bit reload value.

3 TH0 holds the 8-bit timer value; TH1 is not used.

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Siemens EF 88H Series Manual de usuario Pagina 49

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