PIC17LC756AT-08/L Microchip Technology, PIC17LC756AT-08/L Datasheet - Page 42

• Manufacturer Part Number: PIC17LC756AT-08/L
• Description: IC MCU OTP 16KX16 A/D 68PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 17Cr

Specifications of PIC17LC756AT-08/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 8MHz
• 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): 3 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 68-PLCC
• Processor Series: PIC17LC
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 902 B
• Interface Type: I2C, MSSP, RS- 232, SCI, SPI, USART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 50
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 12 bit
• Data Rom Size: 902 B
• Height: 4.06 mm
• Length: 24.33 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Width: 24.33 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC17C7XX
EXAMPLE 6-2:
DS30289B-page 42
; The addresses that are used to store the CPUSTA and WREG values must be in the data memory
; address range of 1Ah - 1Fh. Up to 6 locations can be saved and restored using the MOVFP
; instruction. This instruction neither affects the status bits, nor corrupts the WREG register.
; This routine uses the FRS0, so it controls the FS1 and FS0 bits in the ALUSTA register.
;
Nobank_FSR
Bank_FSR
ALU_Temp
WREG_TEMP
BSR_S1
BSR_S2
BSR_S3
BSR_S4
BSR_S5
BSR_S6
;
INITIALIZATION
;
INIT_POINTERS
PUSH
POP
;
CALL
CLRF
CLRF
BSF
CLRF
MOVLW
MOVWF
MOVWF
MOVLW
MOVWF
:
:
:
:
BSF
BCF
MOVFP
CLRF
MOVPF
MOVPF
MOVPF
MOVFP
MOVFP
MOVFP
MOVFP
MOVPF
MOVFP
;
:
;
CLRF
MOVFP
DECF
MOVFP
MOVFP
BSF
MOVPF
MOVPF
DECF
MOVFP
MOVFP
MOVFP
RETFIE
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
CLEAR_RAM
BSR, F
ALUSTA, F
ALUSTA, FS1
WREG, F
BSR_S1
FSR0
Nobank_FSR
0x20
Bank_FSR
ALUSTA, FS0
ALUSTA, FS1
BSR, INDF0
BSR, F
ALUSTA, ALU_Temp
FSR0, Nobank_FSR
WREG, WREG_TEMP
Bank_FSR, FSR0
ALU_Temp, INDF0
WREG_TEMP, INDF0
PCLATH, INDF0
FSR0, Bank_FSR
Nobank_FSR, FSR0
ALUSTA, F
Bank_FSR, FSR0
FSR0, F
INDF0, PCLATH
INDF0, WREG
ALUSTA, FS1
INDF0, ALU_Temp
FSR0, Bank_FSR
Nobank_FSR, F
Nobank_FSR, FSR0
ALU_Temp, ALUSTA
INDF0, BSR
SAVING STATUS AND WREG IN RAM (NESTED)
0x40
0x41
0x42
0x43
0x01A
0x01B
0x01C
0x01D
0x01E
0x01F
; 1st location to save BSR
; 2nd location to save BSR (Label Not used in program)
; 3rd location to save BSR (Label Not used in program)
; 4th location to save BSR (Label Not used in program)
; 5th location to save BSR (Label Not used in program)
; 6th location to save BSR (Label Not used in program)
;
; Must Clear all Data RAM
; Must Initialize the pointers for POP and PUSH
; Set All banks to 0
; FSR0 post increment
; Clear WREG
; Load FSR0 with 1st address to save BSR
; Your code
; At Interrupt Vector Address
; FSR0 has auto-increment, does not affect status bits
; does not affect status bits
; No Status bits are affected
; Peripheral and Data RAM Bank 0 No Status bits are affected
;
; Save the FSR for BSR values
;
; Restore FSR value for other values
; Push ALUSTA value
; Push WREG value
; Push PCLATH value
; Restore FSR value for other values
;
; Interrupt Service Routine (ISR) code
; FSR0 has auto-decrement, does not affect status bits
; Restore FSR value for other values
;
; Pop PCLATH value
; Pop WREG value
; FSR0 does not change
; Pop ALUSTA value
; Restore FSR value for other values
;
; Save the FSR for BSR values
;
; No Status bits are affected
; Return from interrupt (enable interrupts)
2000 Microchip Technology Inc.