PIC18LF458-I/PT Microchip Technology, PIC18LF458-I/PT Datasheet - Page 321

• Manufacturer Part Number: PIC18LF458-I/PT
• Description: IC MCU CAN FLASH 16K LP 44-TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF458-I/PT

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: PIC18
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 1.5KB
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Package: 44TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 33
• Interface Type: CAN/I2C/SPI/USART
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TBLRD
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
© 2006 Microchip Technology Inc.
Q Cycle Activity:
Before Instruction
After Instruction
Before Instruction
After Instruction
operation
Decode
No
Q1
TABLAT
TBLPTR
MEMORY(0x00A356)
TABLAT
TBLPTR
TABLAT
TBLPTR
MEMORY(0x01A357)
MEMORY(0x01A358)
TABLAT
TBLPTR
(Read Program
Table Read
[ label ]
None
if TBLRD *,
(Prog Mem (TBLPTR))
TBLPTR – No Change;
if TBLRD *+,
(Prog Mem (TBLPTR))
(TBLPTR) + 1
if TBLRD *-,
(Prog Mem (TBLPTR))
(TBLPTR) – 1
if TBLRD +*,
(TBLPTR) + 1
(Prog Mem (TBLPTR))
This instruction is used to read the contents
of Program Memory (P.M.). To address the
program memory, a pointer called Table
Pointer (TBLPTR) is used.
The TBLPTR (a 21-bit pointer) points to each
byte in the program memory. TBLPTR has a
2-Mbyte address range.
The TBLRD instruction can modify the value
of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
1
2
No operation
operation
Memory)
0000
TBLRD
TBLRD
TBLPTR[0] = 0:
TBLPTR[0] = 1:
No
Q2
TBLRD ( *; *+; *-; +*)
*+ ;
+* ;
0000
operation
operation
TBLPTR;
TBLPTR;
TBLPTR;
=
=
=
=
=
=
=
=
=
=
=
No
No
Q3
Least Significant
Byte of Program
Memory Word
Most Significant Byte
of Program Memory
Word
0x55
0x00A356
0x34
0x34
0x00A357
0xAA
0x01A357
0x12
0x34
0x34
0x01A358
0000
TABLAT;
TABLAT;
TABLAT;
TABLAT
No operation
operation
TABLAT)
(Write
No
Q4
nn=0 *
10nn
=1 *+
=2 *-
=3 +*
PIC18FXX8
DS41159E-page 319