MA180025 Microchip Technology, MA180025 Datasheet - Page 144

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F87J90 FAMILY
12.1
Timer1 can operate in one of these modes:
• Timer
• Synchronous Counter
• Asynchronous Counter
The operating mode is determined by the clock select
bit, TMR1CS (T1CON<1>). When TMR1CS is cleared
(= 0), Timer1 increments on every internal instruction
FIGURE 12-1:
FIGURE 12-2:
DS39933D-page 144
Note 1: When enable bit, T1OSCEN, is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
Note 1: When enable bit, T1OSCEN, is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
T1OSO/T13CKI
T1OSO/T13CKI
Timer1 Operation
T1OSI
T1OSI
Timer1 Oscillator
Timer1 Oscillator
T1OSCEN
T1CKPS<1:0>
T1SYNC
TMR1ON
TIMER1 BLOCK DIAGRAM (8-BIT MODE)
T1OSCEN
T1CKPS<1:0>
T1SYNC
TMR1ON
TIMER1 BLOCK DIAGRAM (16-BIT READ/WRITE MODE)
(1)
(1)
TMR1CS
TMR1CS
Clear TMR1
(CCP Special Event Trigger)
Clear TMR1
(CCP Special Event Trigger)
Clock
F
Internal
Clock
Internal
F
OSC
OSC
/4
/4
On/Off
1
0
1
0
Timer1 Clock Input
Timer1 Clock Input
Prescaler
Prescaler
1, 2, 4, 8
1, 2, 4, 8
cycle (F
on every rising edge of the Timer1 external clock input
or the Timer1 oscillator, if enabled.
When Timer1 is enabled, the RC1/T1OSI and
RC0/T1OSO/T13CKI pins become inputs. This means
the values of TRISC<1:0> are ignored and the pins are
read as ‘0’.
2
2
OSC
TMR1L
TMR1L
/4). When the bit is set, Timer1 increments
8
Synchronize
8
Synchronize
Sleep Input
Sleep Input
Detect
Detect
High Byte
High Byte
TMR1H
TMR1
TMR1
8
 2010 Microchip Technology Inc.
8
8
1
0
1
0
Set
TMR1IF
on Overflow
Read TMR1L
Write TMR1L
Internal Data Bus
Set
TMR1IF
on Overflow
Timer1
Timer1
On/Off
On/Off