PIC18F4431-E/PT Microchip Technology, PIC18F4431-E/PT Datasheet - Page 328

• Manufacturer Part Number: PIC18F4431-E/PT
• Description: IC MCU FLASH 8KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4431-E/PT

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K x 16)
• Oscillator Type: Internal
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 9x10b
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: PIC18
• No. Of I/o's: 36
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F2331/2431/4331/4431
TBLRD
Syntax:
Operands:
Operation:
Status Affected:None
Encoding:
Description:
Words:
Cycles:
DS39616B-page 326
Q Cycle Activity:
operation
Decode
No
Q1
(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
TBLPTR[0] = 0:Least Significant
TBLPTR[0] = 1:Most Significant
No
Q2
TBLRD ( *; *+; *-; +*)
0000
operation
operation
TBLPTR;
TBLPTR;
TBLPTR;
No
No
Q3
Byte of Program
Memory Word
Byte of Program
Memory Word
0000
(Write TABLAT)
TABLAT;
TABLAT;
TABLAT;
TABLAT;
No operation
operation
nn=0 *
No
Q4
10nn
=1 *+
=2 *-
=3 +*
Preliminary
TBLRD
Example1:
Example2:
Before Instruction
After Instruction
Before Instruction
After Instruction
TABLAT
TBLPTR
MEMORY(0x00A356)
TABLAT
TBLPTR
TABLAT
TBLPTR
MEMORY(0x01A357)
MEMORY(0x01A358)
TABLAT
TBLPTR
Table Read (cont’d)
TBLRD
TBLRD
 2003 Microchip Technology Inc.
*+ ;
+* ;
=
=
=
=
=
=
=
=
=
=
=
0x55
0x00A356
0x34
0x34
0x00A357
0xAA
0x01A357
0x12
0x34
0x34
0x01A358