p89v660 NXP Semiconductors, p89v660 Datasheet - Page 58

• Manufacturer Part Number: p89v660
• Description: P89v660/p89v662/p89v664 8-bit 80c51 5 V Low Power 16 Kb/32 Kb/64 Kb Flash Microcontroller With 512 B/1 Kb/2 Kb Ram, Dual I2c-bus, Spi
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V660_662_664_2
Product data sheet
Fig 27. PCA interrupt system
PCA TIMER/COUNTER
MODULE0
MODULE1
MODULE2
MODULE3
MODULE4
CMOD.0
The next two bits CAPN (CCAPMn.4) and CAPP (CCAPMn.5) determine the edge that a
capture input will be active on. The CAPN bit enables the negative edge, and the CAPP bit
enables the positive edge. If both bits are set both edges will be enabled and a capture will
occur for either transition.
The last bit in the register ECOM (CCAPMn.6) when set enables the comparator function.
There are two additional registers associated with each of the PCA modules. They are
CCAPnH and CCAPnL and these are the registers that store the 16-bit count when a
capture occurs or a compare should occur. When a module is used in the PWM mode
these registers are used to control the duty cycle of the output.
Table 45.
Not bit addressable; Reset value: 00H
Bit
Symbol
ECF
CMOD - PCA counter mode register (address C1H) bit allocation
CIDL
7
CCAPMn.0
Rev. 02 — 29 January 2008
WDTE
CF
6
CR
ECCFn
5
-
80C51 with 512 B/1 kB/2 kB RAM, dual I
-
CCF4
4
-
CCF3
P89V660/662/664
IEN0.6
CCF2
3
-
EC
CCF1
CPS1
IEN0.7
2
EA
CCF0
© NXP B.V. 2008. All rights reserved.
CPS0
CCON
(C0h)
to
interrupt
priority
decoder
1
2
C-bus, SPI
002aab914
ECF
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