PIC18F2680-H/SP Microchip Technology, PIC18F2680-H/SP Datasheet - Page 161
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PIC18F2680-H/SP
Manufacturer Part Number
PIC18F2680-H/SP
Description
IC MCU 8BIT 48KB FLASH 28SPDIP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheet
1.PIC18F4585-IPT.pdf
(482 pages)
Specifications of PIC18F2680-H/SP
Core Processor
PIC
Core Size
8-Bit
Speed
25MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
25
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.25K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 150°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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14.0
The Timer3 module timer/counter incorporates these
features:
• Software selectable operation as a 16-bit timer or
• Readable and writable 8-bit registers (TMR3H
• Selectable clock source (internal or external) with
• Interrupt-on-overflow
• Module Reset on CCP1 special event trigger
REGISTER 14-1:
© 2007 Microchip Technology Inc.
counter
and TMR3L)
device clock or Timer1 oscillator internal options
TIMER3 MODULE
bit 7
bit 6,3
bit 5-4
bit 2
bit 1
bit 0
T3CON: TIMER3 CONTROL REGISTER
bit 7
RD16: 16-bit Read/Write Mode Enable bit
1 = Enables register read/write of Timer3 in one 16-bit operation
0 = Enables register read/write of Timer3 in two 8-bit operations
T3ECCP1:T3CCP1: Timer3 and Timer1 to ECCP1/CCP1 Enable bits
1x = Timer3 is the capture/compare clock source for both CCP1 and ECCP1 modules
01 = Timer3 is the capture/compare clock source for ECCP1;
00 = Timer1 is the capture/compare clock source for both CCP1 and ECCP1 modules
T3CKPS1:T3CKPS0: Timer3 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
T3SYNC: Timer3 External Clock Input Synchronization Control bit
(Not usable if the device clock comes from Timer1/Timer3.)
When TMR3CS = 1:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
When TMR3CS = 0:
This bit is ignored. Timer3 uses the internal clock when TMR3CS = 0.
TMR3CS: Timer3 Clock Source Select bit
1 = External clock input from Timer1 oscillator or T13CKI (on the rising edge after the first
0 = Internal clock (F
TMR3ON: Timer3 On bit
1 = Enables Timer3
0 = Stops Timer3
Legend:
R = Readable bit
-n = Value at POR
R/W-0
RD16
Note 1: These bits are available on PIC18F4X8X devices only.
falling edge)
Timer1 is the capture/compare clock source for CCP1
T3ECCP1
R/W-0
(1)
OSC
PIC18F2585/2680/4585/4680
T3CKPS1 T3CKPS0 T3CCP1
/4)
R/W-0
Preliminary
W = Writable bit
‘1’ = Bit is set
R/W-0
A simplified block diagram of the Timer3 module is
shown in Figure 14-1. A block diagram of the module’s
operation in Read/Write mode is shown in Figure 14-2.
The Timer3 module is controlled through the T3CON
register (Register 14-1). It also selects the clock source
options for the CCP1 modules (see Section 15.1.1
“CCP1 Modules and Timer Resources” for more
information).
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
(1)
T3SYNC TMR3CS TMR3ON
R/W-0
(1)
x = Bit is unknown
R/W-0
DS39625C-page 159
R/W-0
bit 0
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