PIC16F1507-E/ML Microchip Technology, PIC16F1507-E/ML Datasheet - Page 31

3.5KB Flash, 128B RAM, 18 I/O, CLC, CWG, DDS, 10-bit ADC 20 QFN 4x4mm TUBE

PIC16F1507-E/ML

Manufacturer Part Number
PIC16F1507-E/ML
Description
3.5KB Flash, 128B RAM, 18 I/O, CLC, CWG, DDS, 10-bit ADC 20 QFN 4x4mm TUBE
Manufacturer
Microchip Technology
Series
PIC® 16Fr

Specifications of PIC16F1507-E/ML

Processor Series
PIC16
Core
PIC16F
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
3.5 KB
Data Ram Size
128 B
Interface Type
ICSP
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
18
Number Of Timers
3
Operating Supply Voltage
2.3 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
QFN-20
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
20MHz
Connectivity
-
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
17
Eeprom Size
-
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.3 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Lead Free Status / Rohs Status
 Details
PIC16(L)F1507
3.3
The Program Counter (PC) is 15 bits wide. The low byte
comes from the PCL register, which is a readable and
writable register. The high byte (PC<14:8>) is not directly
readable or writable and comes from PCLATH. On any
Reset, the PC is cleared.
situations for the loading of the PC.
FIGURE 3-3:
3.3.1
Executing any instruction with the PCL register as the
destination simultaneously causes the Program Coun-
ter PC<14:8> bits (PCH) to be replaced by the contents
of the PCLATH register. This allows the entire contents
of the program counter to be changed by writing the
desired upper 7 bits to the PCLATH register. When the
lower 8 bits are written to the PCL register, all 15 bits of
the program counter will change to the values con-
tained in the PCLATH register and those being written
to the PCL register.
3.3.2
A computed GOTO is accomplished by adding an offset to
the program counter (ADDWF PCL). When performing a
table read using a computed GOTO method, care should
DS41586A-page 31
PCLATH
PCLATH
PCLATH
PCL and PCLATH
PC
PC
PC
PC
PC
MODIFYING PCL
COMPUTED GOTO
14
14
14
14
14
6
6
6
4
PCH
PCH
PCH
PCH
PCH
7
7
PC + OPCODE <8:0>
LOADING OF PC IN
DIFFERENT SITUATIONS
PC + W
15
15
0
0
0
OPCODE <10:0>
11
ALU Result
Figure 3-3
PCL
PCL
PCL
PCL
PCL
8
8
W
0
0
0
0
0
shows the five
Instruction with
GOTO, CALL
Destination
PCL as
CALLW
BRW
BRA
Preliminary
be exercised if the table location crosses a PCL memory
boundary (each 256-byte block). Refer to the Application
Note AN556, “Implementing a Table Read” (DS00556).
3.3.3
A computed function CALL allows programs to maintain
tables of functions and provide another way to execute
state machines or look-up tables. When performing a
table read using a computed function CALL, care
should be exercised if the table location crosses a PCL
memory boundary (each 256-byte block).
If using the CALL instruction, the PCH<2:0> and PCL
registers are loaded with the operand of the CALL
instruction. PCH<6:3> is loaded with PCLATH<6:3>.
The CALLW instruction enables computed calls by com-
bining PCLATH and W to form the destination address.
A computed CALLW is accomplished by loading the W
register with the desired address and executing CALLW.
The PCL register is loaded with the value of W and
PCH is loaded with PCLATH.
3.3.4
The branching instructions add an offset to the PC.
This allows relocatable code and code that crosses
page boundaries. There are two forms of branching,
BRW and BRA. The PC will have incremented to fetch
the next instruction in both cases. When using either
branching instruction, a PCL memory boundary may be
crossed.
If using BRW, load the W register with the desired
unsigned address and execute BRW. The entire PC will
be loaded with the address PC + 1 + W.
If using BRA, the entire PC will be loaded with PC + 1 +,
the signed value of the operand of the BRA instruction.
COMPUTED FUNCTION CALLS
BRANCHING
 2011 Microchip Technology Inc.

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