PIC18F2331-E/ML MICROCHIP [Microchip Technology], PIC18F2331-E/ML Datasheet - Page 140
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PIC18F2331-E/ML
Manufacturer Part Number
PIC18F2331-E/ML
Description
28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2331-EML.pdf
(392 pages)
- Current page: 140 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
FIGURE 15-1:
15.1
Timer5 combines two 8-bit registers to function as a
16-bit timer. The TMR5L register is the actual low byte
of the timer; it can be read and written to directly. The
high byte is contained in an unmapped register; it is
read and written to through TMR5H, which serves as
a buffer. Each register increments from 00h to FFh.
A second register pair, PR5H and PR5L, serves as the
Period register; it sets the maximum count for the
TMR5 register pair. When TMR5 reaches the value of
PR5, the timer rolls over to 00h and sets the TMR5IF
interrupt flag. A simplified block diagram of the Timer5
module is shown in Figure 2-1.
DS39616D-page 140
Note:
T5CKI
Special Event
Trigger Input
from IC1
Timer5 Reset
(external)
Set TMR5IF
Special Event
Trigger Output
TMR5CS
T5PS<1:0>
T5SYNC
TMR5ON
Timer5 Operation
Capture or Quadrature Encoder Interface).
The Timer5 may be used as a general pur-
pose timer and as the time base resource to
the
Motion
TIMER5 BLOCK DIAGRAM (16-BIT READ/WRITE MODE SHOWN)
Noise
Filter
1
0
Feedback
Clock
Internal
F
OSC
/4
Module
Reset
Special
Logic
1
0
Event
Logic
Timer5 Reset
(Input
Prescaler
1, 2, 4, 8
2
TMR5
PR5
TMR5L
PR5L
Timer5 supports three configurations:
• 16-Bit Synchronous Timer
• 16-Bit Synchronous Counter
• 16-Bit Asynchronous Counter
In Synchronous Timer configuration, the timer is
clocked by the internal device clock. The optional
Timer5 prescaler divides the input by 2, 4, 8 or not at all
(1:1). The TMR5 register pair increments on Q1.
Clearing TMR5CS (= 0) selects the internal device
clock as the timer sampling clock.
Synchronize
Sleep Input
Comparator
Detect
16
16
High Byte
TMR5H
TMR5
PR5H
8
1
0
8
Write TMR5L
Read TMR5L
2010 Microchip Technology Inc.
8
8
8
8
Timer5
On/Off
Internal Data Bus
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