PIC18F4580T-I/ML Microchip Technology, PIC18F4580T-I/ML Datasheet - Page 406

• Manufacturer Part Number: PIC18F4580T-I/ML
• Description: IC PIC MCU FLASH 16KX16 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4580T-I/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PIC18F2480/2580/4480/4580
TBLWT
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
DS39637D-page 406
Table Write
TBLWT ( *; *+; *-; +*)
None
if TBLWT*,
(TABLAT) → Holding Register,
TBLPTR – No Change;
if TBLWT*+,
(TABLAT) → Holding Register,
(TBLPTR) + 1 → TBLPTR;
if TBLWT*-,
(TABLAT) → Holding Register,
(TBLPTR) – 1 → TBLPTR;
if TBLWT+*,
(TBLPTR) + 1 → TBLPTR,
(TABLAT) → Holding Register;
This instruction uses the 3 LSBs of the
TBLPTR to determine which of the
8 holding registers the TABLAT is written
to. The holding registers are used to pro-
gram the contents of Program Memory
(P.M.). (Refer to Section 7.0 “Flash Pro-
gram Memory” for additional details on
programming Flash memory.)
The TBLPTR (a 21-bit pointer) points to
each byte in the program memory. TBLPTR
has a 2-MBtye 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
1
2
operation
Decode
0000
TBLPTR[0] = 0: Least Significant Byte
TBLPTR[0] = 1: Most Significant Byte of
Q1
No
operation
operation
TABLAT)
(Read
0000
Q2
No
No
of Program Memory
Word
Program Memory Word
operation
operation
0000
Q3
No
No
nn=0 *
Register )
operation
operation
(Write to
Holding
=1 *+
=2 *-
=3 +*
11nn
Q4
No
No
TBLWT
Example 1:
Example 2:
Before Instruction
After Instructions (table write completion)
Before Instruction
After Instruction (table write completion)
TABLAT
TBLPTR
HOLDING REGISTER
(00A356h)
TABLAT
TBLPTR
HOLDING REGISTER
(00A356h)
TABLAT
TBLPTR
HOLDING REGISTER
(01389Ah)
HOLDING REGISTER
(01389Bh)
TABLAT
TBLPTR
HOLDING REGISTER
(01389Ah)
HOLDING REGISTER
(01389Bh)
Table Write (Continued)
TBLWT *+;
TBLWT +*;
© 2009 Microchip Technology Inc.
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=
=
55h
00A356h
FFh
55h
00A357h
55h
34h
01389Ah
FFh
FFh
34h
01389Bh
FFh
34h