Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

C541U Datasheet(PDF) 60 Page - Siemens Semiconductor Group

Part # C541U
Description  8-BIT CMOS MICROCONTROLLER
Download  192 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

C541U Datasheet(HTML) 60 Page - Siemens Semiconductor Group

Back Button C541U_99 Datasheet HTML 56Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 57Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 58Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 59Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 60Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 61Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 62Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 63Page - Siemens Semiconductor Group C541U_99 Datasheet HTML 64Page - Siemens Semiconductor Group Next Button
Zoom Inzoom in Zoom Outzoom out
 60 / 192 page
background image
Semiconductor Group
6-15
1999-04-01
On-Chip Peripheral Components
C541U
6.2
Timers/Counters
The C541U contains two 16-bit timers/counters, timer 0 and 1, which are useful in many
applications for timing and counting.
In "timer" function, the timer register is incremented every machine cycle. Thus one can think of it
as counting machine cycles. Since a machine cycle consists of 6 oscillator periods, the counter rate
is 1/6 of the oscillator frequency.
In "counter" function, the timer register is incremented in response to a 1-to-0 transition (falling
edge) at its corresponding external input pin, T0 or T1 (alternate functions of P3.4 and P3.5). In this
function the external input is sampled during S5P2 of every machine cycle. When the samples show
a high in one cycle and a low in the next cycle, the count is incremented. The new count value
appears in the register during S3P1 of the cycle following the one in which the transition was
detected. Since it takes two machine cycles (12 oscillator periods) to recognize a 1-to-0 transition,
the maximum count rate is 1/12 of the oscillator frequency. There are no restrictions on the duty
cycle of the external input signal, but to ensure that a given level is sampled at least once before it
changes, it must be held for at least one full machine cycle.
6.2.1
Timer/Counter 0 and 1
Timer / counter 0 and 1 of the C541U are fully compatible with timer / counter 0 and 1 of the 80C51/
C501 and can be used in the same four operating modes:
Mode 0: 8-bit timer/counter with a divide-by-32 prescaler
Mode 1: 16-bit timer/counter
Mode 2: 8-bit timer/counter with 8-bit auto-reload
Mode 3: Timer/counter 0 is configured as one 8-bit timer/counter and one 8-bit timer; Timer/
counter 1 in this mode holds its count. The effect is the same as setting TR1 = 0.
External inputs INT0 and INT1 can be programmed to function as a gate for timer/counters 0 and 1
to facilitate pulse width measurements.
Each timer consists of two 8-bit registers (TH0 and TL0 for timer/counter 0, TH1 and TL1 for timer/
counter 1) which may be combined to one timer configuration depending on the mode that is
established. The functions of the timers are controlled by two special function registers TCON and
TMOD.
In the following descriptions the symbols TH0 and TL0 are used to specify the high-byte and the
low-byte of timer 0 (TH1 and TL1 for timer 1, respectively). The operating modes are described and
shown for timer 0. If not explicity noted, this applies also to timer 1.


Similar Part No. - C541U_99

ManufacturerPart #DatasheetDescription
logo
Siemens Semiconductor G...
C541U SIEMENS-C541U Datasheet
497Kb / 63P
   8 BIT CMOS MICROCONTROLLER
C541U SIEMENS-C541U Datasheet
1Mb / 200P
   8-Bit CMOS Microcontroller
More results

Similar Description - C541U_99

ManufacturerPart #DatasheetDescription
logo
Toshiba Semiconductor
TMP87CH34BN TOSHIBA-TMP87CH34BN Datasheet
7Mb / 138P
   CMOS 8-BIT MICROCONTROLLER
logo
Siemens Semiconductor G...
C509-L SIEMENS-C509-L Datasheet
1Mb / 74P
   8-Bit CMOS Microcontroller
C515C SIEMENS-C515C Datasheet
1Mb / 69P
   8-Bit CMOS Microcontroller
logo
Toshiba Semiconductor
TMP86CS64F TOSHIBA-TMP86CS64F Datasheet
564Kb / 12P
   CMOS 8-Bit Microcontroller
TMP86CH21F TOSHIBA-TMP86CH21F Datasheet
603Kb / 11P
   CMOS 8-Bit Microcontroller
TMP86PH06U TOSHIBA-TMP86PH06U Datasheet
513Kb / 13P
   CMOS 8 BIT MICROCONTROLLER
logo
Samsung semiconductor
S3P830A SAMSUNG-S3P830A Datasheet
1Mb / 342P
   8-Bit CMOS Microcontroller
logo
Toshiba Semiconductor
TMP87CS71F TOSHIBA-TMP87CS71F Datasheet
4Mb / 84P
   CMOS 8-BIT MICROCONTROLLER
TMP86C846N TOSHIBA-TMP86C846N Datasheet
537Kb / 10P
   CMOS 8-bit MICROCONTROLLER
logo
Infineon Technologies A...
C515 INFINEON-C515 Datasheet
268Kb / 55P
   8-Bit CMOS Microcontroller
1997-08-01
logo
Toshiba Semiconductor
TMP86FS27FG TOSHIBA-TMP86FS27FG Datasheet
399Kb / 32P
   CMOS 8-BIT MICROCONTROLLER
More results


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


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com