PIC16F818/819
REGISTER 8-1:
T2CON: TIMER2 CONTROL REGISTER (ADDRESS 12h)
U-0
—
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0
bit 0
bit 7
bit 7
Unimplemented: Read as ‘0’
bit 6-3
TOUTPS3:TOUTPS0: Timer2 Output Postscale Select bits
0000=1:1 Postscale
0001=1:2 Postscale
0010=1:3 Postscale
•
•
•
1111=1:16 Postscale
bit 2
TMR2ON: Timer2 On bit
1= Timer2 is on
0= Timer2 is off
bit 1-0
T2CKPS1:T2CKPS0: Timer2 Clock Prescale Select bits
00= Prescaler is 1
01= Prescaler is 4
1x= Prescaler is 16
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
TABLE 8-1:
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
Value on
all other
Resets
Value on
POR, BOR
Address
Name Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0Bh, 8Bh, INTCON GIE
10Bh, 18Bh
PEIE
TMR0IE
INTE
RBIE
TMR0IF
INTF
RBIF
0000 000x 0000 000u
0Ch
PIR1
—
—
ADIF
ADIE
—
—
—
—
SSPIF
SSPIE
CCP1IF TMR2IF TMR1IF -0-- 0000 -0-- 0000
CCP1IE TMR2IE TMR1IE -0-- 0000 -0-- 0000
0000 0000 0000 0000
8Ch
PIE1
11h
TMR2
T2CON
PR2
Timer2 Module Register
12h
—
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
92h
Timer2 Period Register 1111 1111 1111 1111
Legend:
x= unknown, u= unchanged, -= unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
DS39598E-page 64
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
