PIC18F46K80-I/P Microchip Technology Inc., PIC18F46K80-I/P Datasheet - Page 239
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PIC18F46K80-I/P
Manufacturer Part Number
PIC18F46K80-I/P
Description
40 PDIP .600IN TUBE, ECAN, 64KB FLASH, 4KB RAM, 16 MIPS, 12-BIT ADC, CTMU
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F46K80-IPT.pdf
(628 pages)
Specifications of PIC18F46K80-I/P
A/d Inputs
11-Channel, 12-Bit
Comparators
2
Cpu Speed
16 MIPS
Eeprom Memory
1K Bytes
Input Output
35
Interface
I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin PDIP
Programmable Memory
64K Bytes
Ram Size
3.6K Bytes
Speed
64 MHz
Temperature Range
–40 to 125 °C
Timers
2-8-bit, 3-16-bit
Voltage, Range
1.8-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
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17.0
The Timer4 timer modules have the following features:
• Eight-bit Timer register (TMR4)
• Eight-bit Period register (PR4)
• Readable and writable (all registers)
• Software programmable prescaler (1:1, 1:4, 1:16)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMR4 match of PR4
The Timer4 modules have a control register shown in
Register
control bit, TMR4ON (T4CON<2>), to minimize power
consumption. The prescaler and postscaler selection of
Timer4 also are controlled by this register.
is a simplified block diagram of the Timer4 modules.
17.1
Timer4 can be used as the PWM time base for the
PWM mode of the ECCP modules. The TMR4 registers
are readable and writable, and are cleared on any
device Reset. The input clock (F
option of 1:1, 1:4 or 1:16, selected by control bits,
T4CKPS<1:0> (T4CON<1:0>). The match output of
REGISTER 17-1:
2011 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-3
bit 2
bit 1-0
U-0
—
17-1. Timer4 can be shut off by clearing
TIMER4 MODULES
Timer4 Operation
Unimplemented: Read as ‘ 0 ’
T4OUTPS<3:0>: Timer4 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
TMR4ON : Timer4 On bit
1 = Timer4 is on
0 = Timer4 is off
T4CKPS<1:0>: Timer4 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
T4OUTPS3
R/W-0
T4CON: TIMER4 CONTROL REGISTER
W = Writable bit
‘1’ = Bit is set
T4OUTPS2
OSC
R/W-0
/4) has a prescale
Figure 17-1
T4OUTPS1
R/W-0
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PIC18F66K80 FAMILY
T4OUTPS0
R/W-0
TMR4 goes through a four-bit postscaler (that gives a
1:1 to 1:16 inclusive scaling) to generate a TMR4
interrupt, latched in the flag bit, TMR4IF.
gives each module’s flag bit.
The interrupt can be enabled or disabled by setting or
clearing the Timer4 Interrupt Enable bit (TMR4IE),
shown in
The prescaler and postscaler counters are cleared
when any of the following occurs:
• A write to the TMR4 register
• A write to the T4CON register
• Any device Reset – Power-on Reset (POR),
A TMR4 is not cleared when a T4CON is written.
MCLR Reset, Watchdog Timer Reset (WDTR) or
Brown-out Reset (BOR)
Note:
Table
The CCP and ECCP modules use Timers,
1 through 4, for some modes. The assign-
ment of a particular timer to a CCP/ECCP
module is determined by the Timer to CCP
enable bits in the CCPTMRS register. For
more details, see
Register
TMR4ON
R/W-0
17-1.
19-2.
x = Bit is unknown
T4CKPS1
R/W-0
Register 20-2
DS39977C-page 239
T4CKPS0
Table 17-1
R/W-0
bit 0
and
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