CC1010-RTY1 datasheet(55/150 Pages) TI2

55 / 150 page

CC1010

SWRS047A

Page 55 of 146

CKCON (0x8E) - Timer Clock rate Control Register

Bit

Name

R/W

Reset value

Description

Reserved, read as 0

T1M

R/W

Timer 1 clock select. T1M has no effect in counter mode.

0 : Timer 1 uses the

µC clock divided by 12 (for

compatibility with the 80C32)

1 : Timer 1 uses the

µC clock divided by 4

T0M

R/W

Timer 0 clock select. T0M has no effect in counter mode.

0 : Timer 0 uses the

µC clock divided by 12 (for

compatibility with the 80C32)

1 : Timer 0 uses the

µC clock divided by 4

2:0

MD(2:0)

R/W

001

MD(2:0)

controls the memory stretch cycles when

accessing the external RAM. The reset value is 001, but

for faster access to external RAM, MD(2:0) should

always be written 000.

16.2.2

Mode 0

Mode 0 operation is illustrated for timer or

counter 0 and 1 in Figure 8. The timer /

counter uses bit 0 to 4 of TL0 / TL1 and all

8 bits of TH0 / TH1 as a 13 bit counter.

TCON.TR0

/ TCON.TR1 must be set to

enable the Timer / Counter.

The

bit in TMOD selects the Timer or

Counter

clock

source

described.

Transitions are counted from the selected

source,

long

TMOD.GATE0

TMOD.GATE1

is 0, or TMOD.GATE0 /

TMOD.GATE1

is 1 and the corresponding

interrupt

( INT0 / INT1 )

deasserted.

When the 13-bit count increments from

0x1FFF (all ones), the counter rolls over to

all zeros. The overflow flag TCON.TF0 /

TCON.TF1

is then set.

The 3 most significant bits in TL0 / TL1

are undetermined in Mode 0, and should

be masked by software for evaluation.

In Mode 0, the timer timeout period is

determined by:

(

)(

)

xosc

TLx

THx

TxM

CKCON

8192

−

⋅

−

where THx:TLx is the contents of the

THx:TLx registers if this is reloaded in the

interrupt handler, or 0 if no reload is done.

CC1010-RTY1 Folha de dados(PDF) 55 Page - Texas Instruments

CC1010-RTY1 Folha de dados(HTML) 55 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Folha de dados Download

Ligação URL