PIC18F4580-I/P Microchip Technology Inc., PIC18F4580-I/P Datasheet - Page 322
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
PIC18F4580-I/P
Manufacturer Part Number
PIC18F4580-I/P
Description
40 PIN, 32 KB FLASH, 1536 RAM, 36 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F4580-IP.pdf
(402 pages)
Specifications of PIC18F4580-I/P
A/d Inputs
11-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
CAN/I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
32K Bytes
Ram Size
1.5K Bytes
Speed
40 MHz
Timers
1-8 bit, 3-16 bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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TBLWT
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
DS41159D-page 320
PIC18FXX8
Table Write
[ label ]
None
if TBLWT*,
(TABLAT)
TBLPTR – No Change;
if TBLWT*+,
(TABLAT)
(TBLPTR) + 1
if TBLWT*-,
(TABLAT)
(TBLPTR) – 1
if TBLWT+*,
(TBLPTR) + 1
(TABLAT)
This instruction uses the 3 LSBs of TBLPTR to
determine which of the 8 holding registers the
TABLAT is written to. The holding registers are
used to program the contents of Program
Memory (P.M.). (Refer to Section 6.0 “Flash
Program Memory” for additional details.)
The TBLPTR (a 21-bit pointer) points to each
byte in the program memory. TBLPTR has a
2-Mbyte address range. The LSb of the
TBLPTR selects which byte of the program
memory location to access.
The TBLWT instruction can modify the value
of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
0000
TBLPTR[0] = 0:
TBLPTR[0] = 1:
TBLWT ( *; *+; *-; +*)
Holding Register;
Holding Register;
Holding Register;
Holding Register;
0000
TBLPTR;
TBLPTR;
TBLPTR;
Least Significant Byte
of Program Memory
Word
Most Significant Byte
of Program Memory
Word
0000
nn=0 *
11nn
=1 *+
=2 *-
=3 +*
TBLWT Table Write (Continued)
Words: 1
Cycles: 2
Q Cycle Activity:
Example 1:
Example 2:
Before Instruction
After Instructions (table write completion)
Before Instruction
After Instruction (table write completion)
operation
Decode
Q1
No
TABLAT
TBLPTR
HOLDING REGISTER
(0x00A356)
TABLAT
TBLPTR
HOLDING REGISTER
(0x00A356)
TABLAT
TBLPTR
HOLDING REGISTER
(0x01389A)
HOLDING REGISTER
(0x01389B)
TABLAT
TBLPTR
HOLDING REGISTER
(0x01389A)
HOLDING REGISTER
(0x01389B)
No operation
operation
TABLAT)
(Read
Q2
No
TBLWT
TBLWT
2004 Microchip Technology Inc.
*+;
+*;
operation
operation
Q3
=
=
=
=
=
=
=
=
=
=
=
=
=
=
No
No
0x55
0x00A356
0xFF
0x55
0x00A357
0x55
0x34
0x01389A
0xFF
0xFF
0x34
0x01389B
0xFF
0x34
(Write to Holding
No operation
operation
Register)
Q4
No
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