P89CV51RB2_09 datasheet(49/76 Pages) NXP

Teilenummer	P89CV51RB2

Bauteilbeschribung	8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals

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Hersteller	NXP [NXP Semiconductors]

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49 / 76 page

P89CV51RB2_RC2_RD2_3

Product data sheet

Rev. 03 — 25 August 2009

49 of 76

NXP Semiconductors

P89CV51RB2/RC2/RD2

80C51 with 1 kB RAM, SPI

If the CCFn bit for the module in the CCON SFR and the ECCFn bit in the CCAPMn SFR

are set then an interrupt will be generated.

6.9.2 16-bit software timer mode

The PCA modules can be used as software timers (Figure 22) by setting both the ECOM

and MAT bits in the modules CCAPMn register. The PCA timer will be compared to the

module’s capture registers and when a match occurs an interrupt will occur if the CCFn

(CCON SFR) and the ECCFn (CCAPMn SFR) bits for the module are both set.

Fig 21. PCA Capture mode

002aaa538

CCF4

CCF3

CCF2

CCF1

CCF0

CCON

(D8H)

PCA

interrupt

PCA timer/counter

ECOMn

000

CAPPn

CAPNn

MATn

TOGn

PWMn

ECCFn

CCAPMn, n = 0 to 4

(DAH to DEH)

CCAPnH CCAPnL

capture

(to CCFn)

CEXn

P89CV51RB2 Datenblatt(PDF) 49 Page - NXP Semiconductors