PIC17C756-33I/L Microchip Technology, PIC17C756-33I/L Datasheet - Page 52
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PIC17C756-33I/L
Manufacturer Part Number
PIC17C756-33I/L
Description
MICRO CTRL 16K MEMORY OTP 68PLCC
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C752-16L.pdf
(304 pages)
3.PIC17C752-16L.pdf
(4 pages)
4.PIC17C752-16L.pdf
(6 pages)
5.PIC17C756CL.pdf
(321 pages)
Specifications of PIC17C756-33I/L
Core Processor
PIC
Core Size
8-Bit
Speed
33MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
32KB (16K x 16)
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
68-PLCC
For Use With
AC164308 - MODULE SKT FOR PM3 68PLCCDVA17XL681 - DEVICE ADAPTER FOR PIC17C752DM173001 - KIT DEVELOPMENT PICDEM17AC174007 - MODULE SKT PROMATEII 68PLCCAC164024 - ADAPTER PICSTART PLUS 68PLCC
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC17C756-33I/L
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC17C752-16L PDF datasheet #2
- PIC17C752-16L PDF datasheet #3
- PIC17C752-16L PDF datasheet #4
- PIC17C756CL PDF datasheet #5
- Current page: 52 of 321
- Download datasheet (3Mb)
7.7
The Program Counter (PC) is a 16-bit register. PCL,
the low byte of the PC, is mapped in the data memory.
PCL is readable and writable just as is any other regis-
ter. PCH is the high byte of the PC and is not directly
addressable. Since PCH is not mapped in data or pro-
gram memory, an 8-bit register PCLATH (PC high
latch) is used as a holding latch for the high byte of the
PC. PCLATH is mapped into data memory. The user
can read or write PCH through PCLATH.
The 16-bit wide PC is incremented after each instruc-
tion fetch during Q1 unless:
• Modified by a GOTO, CALL, LCALL, RETURN,
• Modified by an interrupt response
• Due to destination write to PCL by an instruction
“Skips” are equivalent to a forced NOP cycle at the
skipped address.
Figure 7-10 and Figure 7-11 show the operation of the
program counter for various situations.
FIGURE 7-10: PROGRAM COUNTER
FIGURE 7-11: PROGRAM COUNTER USING
DS30264A-page 52
RETLW, or RETFIE instruction
PC<15:13>
15
15
7
Program Counter Module
3
5 4
13
PCH
PCLATH
8
Internal data bus <8>
12
OPERATION
THE CALL AND GOTO
INSTRUCTIONS
PCLATH
PCH
5
8
8
8 7
8 7
0
Opcode
PCL
8
PCL
8
0
0
Preliminary
Using Figure 7-10, the operations of the PC and
PCLATH for different instructions are as follows:
a)
b)
c)
d)
e)
Using Figure 7-11, the operation of the PC and
PCLATH for GOTO and CALL instructions is as follows:
The read-modify-write only affects the PCL with the
result. PCH is loaded with the value in the PCLATH.
For example, ADDWF PCL will result in a jump within the
current page. If PC = 03F0h, WREG = 30h and
PCLATH = 03h before instruction, PC = 0320h after the
instruction. To accomplish a true 16-bit computed
jump, the user needs to compute the 16-bit destination
address, write the high byte to PCLATH and then write
the low value to PCL.
The following PC related operations do not change
PCLATH:
a)
b)
c)
LCALL instructions:
An 8-bit destination address is provided in the
instruction (opcode). PCLATH is unchanged.
PCLATH
Opcode<7:0>
Read instructions on PCL:
Any instruction that reads PCL.
PCL
PCH
Write instructions on PCL:
Any instruction that writes to PCL.
8-bit data
PCLATH
Read-Modify-Write instructions on PCL:
Any instruction that does a read-write-modify
operation on PCL, such as ADDWF PCL.
Read:
Write:
RETURN instruction:
Stack<MRU>
CALL, GOTO instructions:
A 13-bit destination address is provided in the
instruction (opcode).
Opcode<12:0>
PC<15:13>
Opcode<12:8>
LCALL, RETLW, and RETFIE instructions.
Interrupt vector is forced onto the PC.
Read-modify-write instructions on PCL (e.g.
BSF PCL).
data bus
PCLATH
PCL
8-bit result
PCLATH
PCH
PCH
data bus
PCLATH<7:5>
PC<15:0>
data bus
PCL
PC<12:0>
PCLATH<4:0>
ALU or destination
PCH
1997 Microchip Technology Inc.
data bus
PCL
ALU
PCL
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