PIC10F220-E/P Microchip Technology, PIC10F220-E/P Datasheet - Page 22

• Manufacturer Part Number: PIC10F220-E/P
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 10Fr

Specifications of PIC10F220-E/P

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: POR, WDT
• Number Of I /o: 3
• Program Memory Size: 384B (256 x 12)
• Program Memory Type: FLASH
• Ram Size: 16 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Processor Series: PIC10F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 16 B
• Interface Type: USB
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 4
• Number Of Timers: 1
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 2 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162070 - HEADER INTRFC MPLAB ICD2 8/14PAC164037 - MODULE SKT 6L PROMATE II SOT23
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

PIC10F220/222
4.9
The INDF register is not a physical register. Addressing
INDF actually addresses the register whose address is
contained in the FSR register (FSR is a pointer). This is
indirect addressing.
4.9.1
• Register file 09 contains the value 10h
• Register file 0A contains the value 0Ah
• Load the value 09 into the FSR register
• A read of the INDF register will return the value
• Increment the value of the FSR register by one
• A read of the INDR register now will return the
Reading INDF itself indirectly (FSR = 0) will produce
00h. Writing to the INDF register indirectly results in a
no-operation (although Status bits may be affected).
A simple program to clear RAM locations 10h-1Fh
using Indirect addressing is shown in Example 4-1.
FIGURE 4-6:
DS41270E-page 20
of 10h
(FSR = 0A)
value of 0Ah.
Note 1: For register map detail, see Section 4.3 “Data Memory Organization”.
Indirect Data Addressing; INDF
and FSR Registers
INDIRECT ADDRESSING
DIRECT/INDIRECT ADDRESSING
Location Select
Data
Memory
Direct Addressing
4
(opcode)
(1)
1Fh
00h
0Fh
10h
0
Bank 0
EXAMPLE 4-1:
The FSR is a 5-bit wide register. It is used in conjunc-
tion with the INDF register to indirectly address the data
memory area.
The FSR<4:0> bits are used to select data memory
addresses 00h to 1Fh.
NEXT
CONTINUE
Note:
MOVLW
MOVWF
CLRF
INCF
BTFSC
GOTO
Do not use banking. FSR <7:5> are
unimplemented and read as ‘1’s.
Indirect Addressing
:
:
4
0x10
FSR
INDF
FSR,F
FSR,4
NEXT
Location Select
(FSR)
HOW TO CLEAR RAM
USING INDIRECT
ADDRESSING
© 2007 Microchip Technology Inc.
;initialize pointer
;to RAM
;clear INDF
;register
;inc pointer
;all done?
;NO, clear next
;YES, continue
0