Electronic Components Datasheet Search |
|
P89V51RD2 Datasheet(PDF) 28 Page - NXP Semiconductors |
|
P89V51RD2 Datasheet(HTML) 28 Page - NXP Semiconductors |
28 / 75 page Philips Semiconductors P89V51RD2 8-bit microcontrollers with 80C51 core Product data Rev. 01 — 01 March 2004 28 of 75 9397 750 12964 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. 7.3.4 Mode 3 When timer 1 is in Mode 3 it is stopped (holds its count). The effect is the same as setting TR1 = 0. Timer 0 in Mode 3 establishes TL0 and TH0 as two separate 8-bit counters. The logic for Mode 3 and Timer 0 is shown in Figure 10. TL0 uses the Timer 0 control bits: T0C/T, T0GATE, TR0, INT0, and TF0. TH0 is locked into a timer function (counting machine cycles) and takes over the use of TR1 and TF1 from Timer 1. Thus, TH0 now controls the ‘Timer 1’ interrupt. Mode 3 is provided for applications that require an extra 8-bit timer. With Timer 0 in Mode 3, the P89V51RD2 can look like it has an additional Timer. Note: When Timer 0 is in Mode 3, Timer 1 can be turned on and off by switching it into and out of its own Mode 3. It can still be used by the serial port as a baud rate generator, or in any application not requiring an interrupt. 7.4 Timer 2 Timer 2 is a 16-bit Timer/Counter which can operate as either an event timer or an event counter, as selected by C/T2 in the special function register T2CON. Timer 2 has four operating modes: Capture, Auto-reload (up or down counting), Clock-out, and Baud Rate Generator which are selected according to Table 17 using T2CON (Table 18 and Table 19) and T2MOD (Table 20 and Table 21). Fig 9. Timer/Counter 0 or 1 in Mode 2 (8-bit auto-reload). 002aaa521 Osc/6 Tn pin TRn TnGate INTn Pin C/T = 0 C/T = 1 TLn (8-bits) THn (8-bits) TFn control overflow reload interrupt Fig 10. Timer/Counter 0 Mode 3 (two 8-bit counters). 002aaa522 Osc/6 Osc/2 TR1 T0 pin TR0 TnGate INT0 Pin C/T = 0 C/T = 1 TL0 (8-bits) TF0 control overflow interrupt TH0 (8-bits) TF1 control overflow interrupt |
Similar Part No. - P89V51RD2 |
|
Similar Description - P89V51RD2 |
|
|
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 |
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 |