PIC18F45K20-E/MV Microchip Technology, PIC18F45K20-E/MV Datasheet - Page 167
![32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T](/photos/16/15/161538/qfn-40_sml.jpg)
PIC18F45K20-E/MV
Manufacturer Part Number
PIC18F45K20-E/MV
Description
32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F25K20T-ISS.pdf
(456 pages)
Specifications of PIC18F45K20-E/MV
Processor Series
PIC18
Core
PIC18F
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
8 KB
Data Ram Size
512 B
Interface Type
I2C, SPI, SCI, USB, MSSP, RJ11
Maximum Clock Frequency
64 MHz
Number Of Programmable I/os
35
Number Of Timers
4
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
UQFN-40
Development Tools By Supplier
MPLAB Integrated Development Environment
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 125 C
Supply Current (max)
30 uA
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
35
Eeprom Size
256 x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 14x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Lead Free Status / Rohs Status
Details
- Current page: 167 of 456
- Download datasheet (4Mb)
14.0
The Timer2 module timer incorporates the following
features:
• 8-bit timer and period registers (TMR2 and PR2,
• Readable and writable (both registers)
• Software programmable prescaler (1:1, 1:4 and
• Software programmable postscaler (1:1 through
• Interrupt on TMR2-to-PR2 match
• Optional use as the shift clock for the MSSP
The module is controlled through the T2CON register
(Register 14-1), which enables or disables the timer
and configures the prescaler and postscaler. Timer2
can be shut off by clearing control bit, TMR2ON of the
T2CON register, to minimize power consumption.
A simplified block diagram of the module is shown in
Figure 14-1.
REGISTER 14-1:
2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-3
bit 2
bit 1-0
respectively)
1:16)
1:16)
module
U-0
—
TIMER2 MODULE
Unimplemented: Read as ‘0’
T2OUTPS<3:0>: Timer2 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
T2CKPS<1:0>: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
T2OUTPS3
R/W-0
T2CON: TIMER2 CONTROL REGISTER
W = Writable bit
‘1’ = Bit is set
T2OUTPS2
R/W-0
T2OUTPS1
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
T2OUTPS0
R/W-0
14.1
In normal operation, TMR2 is incremented from 00h on
each clock (F
clock input gives direct input, divide-by-4 and
divide-by-16 prescale options; these are selected by
the prescaler control bits, T2CKPS<1:0> of the T2CON
register. The value of TMR2 is compared to that of the
period register, PR2, on each clock cycle. When the
two values match, the comparator generates a match
signal as the timer output. This signal also resets the
value of TMR2 to 00h on the next cycle and drives the
output counter/postscaler (see Section 14.2 “Timer2
Interrupt”).
The TMR2 and PR2 registers are both directly readable
and writable. The TMR2 register is cleared on any
device Reset, whereas the PR2 register initializes to
FFh. Both the prescaler and postscaler counters are
cleared on the following events:
• a write to the TMR2 register
• a write to the T2CON register
• any device Reset (Power-on Reset, MCLR Reset,
TMR2 is not cleared when T2CON is written.
PIC18F2XK20/4XK20
Watchdog Timer Reset or Brown-out Reset)
Timer2 Operation
TMR2ON
OSC
R/W-0
/4). A 4-bit counter/prescaler on the
x = Bit is unknown
T2CKPS1
R/W-0
DS41303G-page 167
T2CKPS0
R/W-0
bit 0
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