p89v51rb2 NXP Semiconductors, p89v51rb2 Datasheet - Page 48

• Manufacturer Part Number: p89v51rb2
• Description: 8-bit 80c51 5 V Low Power 16/32/64 Kb Flash Microcontroller With 1 Kb Ram
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V51RB2_RC2_RD2_4
Product data sheet
Fig 22. PCA interrupt system
PCA TIMER/COUNTER
MODULE0
MODULE1
MODULE2
MODULE3
MODULE4
CMOD.0
Table 35.
Not bit addressable; Reset value: 00H
Table 36.
Table 37.
Bit
7
6
5 to 3
2 to 1
0
CPS1
0
Bit
Symbol
ECF
CMOD - PCA counter mode register (address D9H) bit allocation
CMOD - PCA counter mode register (address D9H) bit description
CMOD - PCA counter mode register (address D9H) count pulse select
Symbol
CIDL
WDTE
-
CPS1,
CPS0
ECF
CIDL
7
CPS0
0
CCAPMn.0
WDTE
CF
Rev. 04 — 1 May 2007
6
Description
Counter Idle Control: CIDL = 0 programs the PCA Counter to continue
functioning during Idle mode. CIDL = 1 programs it to be gated off
during idle.
Watchdog Timer Enable: WDTE = 0 disables watchdog timer function
on module 4. WDTE = 1 enables it.
Reserved for future use. Should be set to ‘0’ by user programs.
PCA Count Pulse Select (see
PCA Enable Counter Overflow Interrupt: ECF = 1 enables CF bit in
CCON to generate an interrupt. ECF = 0 disables that function.
CR
ECCFn
5
-
Select PCA input
0 Internal clock, f
-
CCF4
P89V51RB2/RC2/RD2
4
-
CCF3
8-bit microcontrollers with 80C51 core
osc
Table 37
IEN0.6
CCF2
/ 6
3
-
EC
CCF1
below).
CPS1
IEN0.7
2
EA
CCF0
© NXP B.V. 2007. All rights reserved.
CPS0
CCON
(D8H)
to
interrupt
priority
decoder
1
002aaa533
ECF
48 of 80
0