PIC16C76-20/SO Microchip Technology, PIC16C76-20/SO Datasheet - Page 41

• Manufacturer Part Number: PIC16C76-20/SO
• Description: IC MCU OTP 8KX14 A/D PWM 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C76-20/SO

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 22
• Program Memory Type: OTP
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16C
• No. Of I/o's: 22
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 368 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: 0 C
• On-chip Adc: 5 bit
• Data Rom Size: 368 B
• Height: 2.31 mm
• Length: 17.87 mm
• Supply Voltage (max): 6 V
• Supply Voltage (min): 4 V
• Width: 7.49 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL309-1073 - ADAPTER 28-SOIC TO 28-SOIC309-1024 - ADAPTER 28-SOIC TO 28-DIP309-1023 - ADAPTER 28-SOIC TO 28-DIP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Example 4-1 shows the calling of a subroutine in
page 1 of the program memory. This example assumes
that PCLATH is saved and restored by the interrupt ser-
vice routine (if interrupts are used).
EXAMPLE 4-1:
ORG 0x500
BSF
BCF
CALL
ORG 0x900
SUB1_P1:
RETURN
FIGURE 4-18: DIRECT/INDIRECT ADDRESSING
1997 Microchip Technology Inc.
RP1:RP0
bank select
For register file map detail see Figure 4-4, and Figure 4-5.
PCLATH,3
PCLATH,4
SUB1_P1
:
:
:
:
:
location select
6
Direct Addressing
Data
Memory
CALL OF A SUBROUTINE IN
PAGE 1 FROM PAGE 0
;Select page 1 (800h-FFFh)
;Only on >4K devices
;Call subroutine in
;page 1 (800h-FFFh)
;called subroutine
;page 1 (800h-FFFh)
;return to Call subroutine
;in page 0 (000h-7FFh)
from opcode
00h
7Fh
Bank 0
00
0
80h
FFh
Bank 1
01
100h
17Fh
Bank 2
10
not used
4.5
The INDF register is not a physical register. Addressing
the INDF register will cause indirect addressing.
Indirect addressing is possible by using the INDF reg-
ister. Any instruction using the INDF register actually
accesses the register pointed to by the File Select Reg-
ister, FSR. Reading the INDF register itself indirectly
(FSR = '0') will read 00h. Writing to the INDF register
indirectly results in a no-operation (although status bits
may be affected). An effective 9-bit address is obtained
by concatenating the 8-bit FSR register and the IRP bit
(STATUS<7>), as shown in Figure 4-18.
A simple program to clear RAM locations 20h-2Fh
using indirect addressing is shown in Example 4-2.
EXAMPLE 4-2:
NEXT
CONTINUE
180h
1FFh
Bank 3
11
Indirect Addressing, INDF and FSR
Registers
Applicable Devices
72 73 73A 74 74A 76 77
movlw
movwf
clrf
incf
btfss
goto
:
IRP
bank select
0x20
FSR
INDF
FSR,F
FSR,4
NEXT
INDIRECT ADDRESSING
7
Indirect Addressing
;initialize pointer
;to RAM
;clear INDF register
;inc pointer
;all done?
;no clear next
PIC16C7X
;yes continue
FSR register
DS30390E-page 41
location select
0